Inanna is the ancient Mesopotamian goddess of love, war, and fertility. She is also associated with sensuality, procreation, divine law, and political power. Originally worshipped in Sumer, she was known by the Akkadian Empire, Babylonians, and Assyrians as Ishtar (and occasionally the logogram 𒌋𒁯). Her primary title is "the Queen of Heaven".

She was the patron goddess of the Eanna temple at the city of Uruk, her early main cult center. In archaic Uruk she was worshipped in three forms: morning Inanna (Inana-UD/hud), evening Inanna (Inanna sig) and princely Inanna (Inanna NUN), the former two reflecting the phases of her associated planet Venus. Her most prominent symbols include the lion and the eight-pointed star. Her husband is the god Dumuzid (later known as Tammuz), and her sukkal (attendant) is the goddess Ninshubur, later conflated with the male deities Ilabrat and Papsukkal.

Inanna was worshipped in Sumer at least as early as the Uruk period (c. 4000 – 3100 BCE), and her cultic activity was relatively localized before the conquest of Sargon of Akkad. During the post-Sargonic era, she became one of the most widely venerated deities in the Sumerian pantheon, with temples across Mesopotamia. The cult of Inanna/Ishtar, which may have been associated with a variety of sexual rites, was continued by the East Semitic-speaking peoples (Akkadians, Assyrians and Babylonians) who succeeded and absorbed the Sumerians in the region.

She was especially beloved by the Assyrians, who elevated her to become the highest deity in their pantheon, ranking above their own national god Ashur. Inanna/Ishtar is alluded to in the Hebrew Bible, and she greatly influenced the Ugaritic goddess Ashtart and later the Phoenician goddess Astarte, who in turn possibly influenced the development of the Greek goddess Aphrodite. Her cult continued to flourish until its gradual decline between the first and sixth centuries CE in the wake of Christianity.

Inanna appears in more myths than any other Sumerian deity. She also has a uniquely high number of epithets and alternate names, comparable only to Nergal.

Many of her myths involve her taking over the domains of other deities. She is believed to have been given the mes, which represent all positive and negative aspects of civilization, by Enki, the god of wisdom. She is also believed to have taken over the Eanna temple from An, the god of the sky. Alongside her twin brother Utu (later known as Shamash), Inanna is the enforcer of divine justice; she destroyed Mount Ebih for having challenged her authority, unleashed her fury upon the gardener Shukaletuda after he raped her in her sleep, and tracked down the bandit woman Bilulu and killed her in divine retribution for having murdered Dumuzid. In the standard Akkadian version of the Epic of Gilgamesh, Ishtar asks Gilgamesh to become her consort. When he disdainfully refuses, she unleashes the Bull of Heaven, resulting in the death of Enkidu and Gilgamesh's subsequent grapple with his own mortality.

Inanna's most famous myth is the story of her descent into and return from the ancient Mesopotamian underworld, ruled by her older sister Ereshkigal. After she reaches Ereshkigal's throne room, the seven judges of the underworld deem her guilty and strike her dead. Three days later, Ninshubur pleads with all the gods to bring Inanna back. All of them refuse her, except Enki, who sends two sexless beings to rescue Inanna.

They escort Inanna out of the underworld but the galla, the guardians of the underworld, drag her husband Dumuzid down to the underworld as her replacement. Dumuzid is eventually permitted to return to heaven for half the year, while his sister Geshtinanna remains in the underworld for the other half, resulting in the cycle of the seasons.

Scholars believe that Inanna and Ishtar were originally separate, unrelated deities, but were conflated with one another during the reign of Sargon of Akkad and came to be regarded as effectively the same goddess under two different names. Inanna's name may derive from the Sumerian phrase nin-an-ak, meaning "Lady of Heaven", but the cuneiform sign for Inanna (𒈹) is not a ligature of the signs lady (Sumerian: nin; cuneiform: 𒊩𒌆 SAL.TUG₂) and sky (Sumerian: an; cuneiform: 𒀭 AN). These difficulties led some early Assyriologists to suggest that Inanna may have originally been a Proto-Euphratean goddess, who was only later accepted into the Sumerian pantheon. This idea was supported by Inanna's youthfulness, as well as the fact that, unlike the other Sumerian divinities, she seems to have initially lacked a distinct sphere of responsibilities. The view that there was a Proto-Euphratean substrate language in Southern Iraq before Sumerian is not widely accepted by modern Assyriologists.

The name Ishtar occurs as an element in personal names from both the pre-Sargonic and post-Sargonic eras in Akkad, Assyria, and Babylonia. It is of Semitic derivation and is probably etymologically related to the name of the West Semitic god Attar, who is mentioned in later inscriptions from Ugarit and southern Arabia. The morning star may have been conceived as a male deity who presided over the arts of war and the evening star may have been conceived as a female deity who presided over the arts of love. Among the Akkadians, Assyrians, and Babylonians, the name of the male god eventually supplanted the name of his female counterpart, but, due to extensive syncretism with Inanna, the deity remained as female, although her name was in the masculine form.

Inanna has posed a problem for many scholars of ancient Sumer due to the fact that her sphere of power contained more distinct and contradictory aspects than that of any other deity. Two major theories regarding her origins have been proposed. The first explanation holds that Inanna is the result of a syncretism between several previously unrelated Sumerian deities with totally different domains. The second explanation holds that Inanna was originally a Semitic deity who entered the Sumerian pantheon after it was already fully structured, and who took on all the roles that had not yet been assigned to other deities.

As early as the Uruk period (c. 4000–3100 BCE), Inanna was already associated with the city of Uruk. During this period, the symbol of a ring-headed doorpost was closely associated with Inanna. The famous Uruk Vase (found in a deposit of cult objects of the Uruk III period) depicts a row of naked men carrying various objects, including bowls, vessels, and baskets of farm products, and bringing sheep and goats to a female figure facing the ruler. The female stands in front of Inanna's symbol of the two twisted reeds of the doorpost, while the male figure holds a box and stack of bowls, the later cuneiform sign signifying the En, or high priest of the temple.

Seal impressions from the Jemdet Nasr period (c. 3100–2900 BCE) show a fixed sequence of symbols representing various cities, including those of Ur, Larsa, Zabalam, Urum, Arina, and probably Kesh. This list probably reflects the report of contributions to Inanna at Uruk from cities supporting her cult. A large number of similar seals have been discovered from phase I of the Early Dynastic period (c. 2900–2350 BCE) at Ur, in a slightly different order, combined with the rosette symbol of Inanna. These seals were used to lock storerooms to preserve materials set aside for her cult.

Various inscriptions in the name of Inanna are known, such as a bead in the name of King Aga of Kish c. 2600 BCE, or a tablet by King Lugal-kisalsi c. 2400 BCE:

For An, king of all the lands, and for Inanna, his mistress, Lugal-kisalsi, king of Kish, built the wall of the courtyard.

— Inscription of Lugal-kisalsi.

During the Akkadian period (c.  2334–2154 BCE), following the conquests of Sargon of Akkad, Inanna and originally independent Ishtar became so extensively syncretized that they became regarded as effectively the same. The Akkadian poet Enheduanna, the daughter of Sargon, wrote numerous hymns to Inanna, identifying her with Ishtar. As a result of this, the popularity of Inanna/Ishtar's cult skyrocketed. Alfonso Archi, who was involved in early excavations of Ebla, assumes Ishtar was originally a goddess venerated in the Euphrates valley, pointing out that an association between her and the desert poplar is attested in the most ancient texts from both Ebla and Mari. He considers her, a moon god (e.g., Sin) and a sun deity of varying gender (Shamash/Shapash) to be the only deities shared between various early Semitic peoples of Mesopotamia and ancient Syria, who otherwise had different not necessarily overlapping pantheons.

Gwendolyn Leick assumes that during the Pre-Sargonic era, the cult of Inanna was rather limited, though other experts argue that she was already the most prominent deity in Uruk and a number of other political centers in the Uruk period. She had temples in Nippur, Lagash, Shuruppak, Zabalam, and Ur, but her main cult center was the Eanna temple in Uruk, whose name means "House of Heaven" (Sumerian: e₂-anna; cuneiform: 𒂍𒀭 E₂.AN). Some research assumes that the original patron deity of this fourth-millennium BCE city was An. After its dedication to Inanna, the temple seems to have housed priestesses of the goddess. Next to Uruk, Zabalam was the most important early site of Inanna worship, as the name of the city was commonly written with the signs MUŠ₃ and UNUG, meaning respectively "Inanna" and "sanctuary". It is possible that the city goddess of Zabalam was originally a distinct deity, though one whose cult was absorbed by that of the Urukean goddess very early on. Joan Goodnick Westenholz proposed that a goddess identified by the name Nin-UM (reading and meaning uncertain), associated with Ishtaran in a zame hymn, was the original identity of Inanna of Zabalam.

In the Old Akkadian period, Inanna merged with the Akkadian goddess Ishtar, associated with the city of Agade. A hymn from that period addresses the Akkadian Ishtar as "Inanna of the Ulmaš" alongside Inanna of Uruk and of Zabalam. The worship of Ishtar and syncretism between her and Inanna was encouraged by Sargon and his successors, and as a result she quickly became one of the most widely venerated deities in the Mesopotamian pantheon. In inscriptions of Sargon, Naram-Sin, and Shar-Kali-Sharri, Ishtar is the most frequently invoked deity.

In the Old Babylonian period, her main cult centers were Uruk, Zabalam, Agade, and Ilip. Her cult was also introduced from Uruk to Kish.

During later times, while her cult in Uruk continued to flourish, Ishtar also became particularly worshipped in the Upper Mesopotamian kingdom of Assyria (modern northern Iraq, northeast Syria, and southeast Turkey), especially in the cities of Nineveh, Aššur, and Arbela (modern Erbil). During the reign of the Assyrian king Assurbanipal, Ishtar rose to become the most important and widely venerated deity in the Assyrian pantheon, surpassing even the Assyrian national god Ashur. Votive objects found in her primary Assyrian temple indicate that she was a popular deity among women.

Individuals who went against the gender binary were heavily involved in the cult of Inanna. During Sumerian times, a set of priests known as gala worked in Inanna's temples, where they performed elegies and lamentations. Men who became gala sometimes adopted female names, and their songs were composed in the Sumerian eme-sal dialect, which, in literary texts, is normally reserved for the speech of female characters. Some Sumerian proverbs seem to suggest that gala had a reputation for engaging in anal sex with men. During the Akkadian Period, kurgarrū and assinnu were servants of Ishtar who dressed in female clothing and performed war dances in Ishtar's temples. Several Akkadian proverbs seem to suggest that they may have also had homosexual proclivities. Gwendolyn Leick, an anthropologist known for her writings on Mesopotamia, has compared these individuals to the contemporary Indian hijra. In one Akkadian hymn, Ishtar is described as transforming men into women.

Throughout the latter half of the twentieth century, it was widely believed that the cult of Inanna involved a "sacred marriage" ritual, in which a king would establish his legitimacy by taking on the role of Dumuzid and engaging in ritual sexual intercourse with the high priestess of Inanna, who took on the role of the goddess. This view has been challenged, however, and scholars continue to debate whether the sacred marriage described in literary texts involved any kind of physical ritual enactment at all and, if so, whether this ritual enactment involved actual intercourse or merely the symbolic representation of intercourse. The scholar of the ancient Near East Louise M. Pryke states that most scholars now maintain, if the sacred marriage was a ritual that was actually acted out, then it involved only symbolic intercourse.

The cult of Ishtar was long thought to have involved sacred prostitution, but this is now rejected among many scholars. Hierodules known as ishtaritum are reported to have worked in Ishtar's temples, but it is unclear if such priestesses actually performed any sex acts, and several modern scholars have argued that they did not. Women across the ancient Near East worshipped Ishtar by dedicating to her cakes baked in ashes (known as kamān tumri). A dedication of this type is described in an Akkadian hymn. Several clay cake molds discovered at Mari are shaped like naked women with large hips who are clutching their breasts. Some scholars have suggested that the cakes made from these molds were intended as representations of Ishtar herself. In the Biblical book of Jeremiah, the prophet condemns Judean female refugees for worshipping the Queen of Heaven (a syncretism of Ishtar and Asherah) by baking cakes with the goddess's image upon them and pouring libations to her (Jer. Ch. 7 and 44). The women and their husbands defy him, and state that they will follow the practices of their ancestors, who performed these acts "in the towns of Judea and the streets of Jerusalem" (Jer. 44:15-19). In Ezekiel 8:14, the prophet has a vision of the women of Jerusalem weeping for Tammuz.

Inanna/Ishtar's most common symbol was the eight-pointed star, though the exact number of points sometimes varies; six-pointed stars also occur frequently, but their symbolic meaning is unknown. The eight-pointed star seems to have originally borne a general association with the heavens, but, by the Old Babylonian Period (c. 1830 – c. 1531 BCE), it had come to be specifically associated with the planet Venus, with which Ishtar was identified. Starting during this same period, the star of Ishtar was normally enclosed within a circular disc. During later Babylonian times, slaves who worked in Ishtar's temples were sometimes branded with the seal of the eight-pointed star. On boundary stones and cylinder seals, the eight-pointed star is sometimes shown alongside the crescent moon, which was the symbol of Sin (Sumerian Nanna) and the rayed solar disk, which was a symbol of Shamash (Sumerian Utu).

Inanna's cuneiform ideogram was a hook-shaped twisted knot of reeds, representing the doorpost of the storehouse, a common symbol of fertility and plenty. The rosette was another important symbol of Inanna, which continued to be used as a symbol of Ishtar after their syncretism. During the Neo-Assyrian Period (911 – 609 BCE), the rosette may have actually eclipsed the eight-pointed star and become Ishtar's primary symbol. The temple of Ishtar in the city of Aššur was adorned with numerous rosettes.

Inanna/Ishtar was associated with lions, which the ancient Mesopotamians regarded as a symbol of power. Her associations with lions began during Sumerian times; a chlorite bowl from the temple of Inanna at Nippur depicts a large feline battling a giant snake and a cuneiform inscription on the bowl reads "Inanna and the Serpent", indicating that the cat is supposed to represent the goddess. During the Akkadian Period, Ishtar was frequently depicted as a heavily armed warrior goddess with a lion as one of her attributes.

Doves were also prominent animal symbols associated with Inanna/Ishtar. Doves are shown on cultic objects associated with Inanna as early as the beginning of the third millennium BCE. Lead dove figurines were discovered in the temple of Ishtar at Aššur, dating to the thirteenth century BCE and a painted fresco from Mari, Syria shows a giant dove emerging from a palm tree in the temple of Ishtar, indicating that the goddess herself was sometimes believed to take the form of a dove.

Inanna was associated with the planet Venus, which is named after her Roman equivalent. Several hymns praise Inanna in her role as the goddess or personification of the planet Venus. Theology professor Jeffrey Cooley has argued that, in many myths, Inanna's movements may correspond with the movements of Venus across the sky. In Inanna's Descent to the Underworld, Inanna, unlike any other deity, is able to descend into the netherworld and return to the heavens. The planet Venus appears to make a similar descent, setting in the West and then rising again in the East. An introductory hymn describes Inanna leaving the heavens and heading for Kur, what could be presumed to be the mountains, replicating the rising and setting of Inanna to the West. In Inanna and Shukaletuda, Shukaletuda is described as scanning the heavens in search of Inanna, possibly searching the Eastern and Western horizons. In the same myth, while searching for her attacker, Inanna herself makes several movements that correspond with the movements of Venus in the sky.

Because the movements of Venus appear to be discontinuous (it disappears due to its proximity to the Sun, for many days at a time, and then reappears on the other horizon), some cultures did not recognize Venus as a single entity; instead, they assumed it to be two separate stars on each horizon: the morning and evening star. Nonetheless, a cylinder seal from the Jemdet Nasr period indicates that the ancient Sumerians knew that the morning and evening stars were the same celestial object. The discontinuous movements of Venus relate to both mythology as well as Inanna's dual nature.

Modern astrologers recognize the story of Inanna's descent into the underworld as a reference to an astronomical phenomenon associated with retrograde Venus. Seven days before retrograde Venus makes its inferior conjunction with the sun, it disappears from the evening sky. The seven day period between this disappearance and the conjunction itself is seen as the astronomical phenomenon on which the myth of descent was based. After the conjunction, seven more days elapse before Venus appears as the morning star, corresponding to the ascent from the underworld.

Inanna in her aspect as Anunītu was associated with the eastern fish of the last of the zodiacal constellations, Pisces. Her consort Dumuzi was associated with the contiguous first constellation, Aries.

• 
  Babylonian terracotta relief of Ishtar from Eshnunna (early second millennium BCE)
• 
  Life-sized statue of a goddess, probably Ishtar, holding a vase from Mari, Syria (eighteenth century BC)
• 
  Terracotta relief of Ishtar with wings from Larsa (second millennium BCE)
• 
  Stele showing Ishtar holding a bow from Ennigaldi-Nanna's museum (eighth century BCE)
• 
  Hellenized bas-relief sculpture of Ishtar standing with her servant from Palmyra (third century CE)

The Sumerians worshipped Inanna as the goddess of both warfare and love. Unlike other gods, whose roles were static and whose domains were limited, the stories of Inanna describe her as moving from conquest to conquest. She is portrayed as young and impetuous, constantly striving for more power than had been allotted to her.

While she was worshipped as the goddess of love, Inanna was not the goddess of marriage, nor was she ever viewed as a mother goddess. Andrew R. George goes as far as stating that "According to all mythology, Ištar was not [...] temperamentally disposed" towards such functions. Julia M. Asher-Greve has even championed the significance of Inanna specifically because she is not a mother-goddess. As a love goddess, she was commonly invoked by Mesopotamians in incantations.

In Inanna's Descent to the Underworld, Inanna treats her lover Dumuzid in a very capricious manner. This aspect of Inanna's personality is emphasized in the later standard Akkadian version of the Epic of Gilgamesh in which Gilgamesh points out Ishtar's infamous ill-treatment of her lovers. However, according to assyriologist Dina Katz, the portrayal of Inanna's relationship with Dumuzi in the Descent myth is unusual.

Inanna was also worshipped as one of the Sumerian war deities. One of the hymns dedicated to her declares: "She stirs confusion and chaos against those who are disobedient to her, speeding carnage and inciting the devastating flood, clothed in terrifying radiance. It is her game to speed conflict and battle, untiring, strapping on her sandals." Battle itself was occasionally referred to as the "Dance of Inanna". Epithets related to lions in particular were meant to highlight this aspect of her character. As a war goddess she was sometimes referred to with the name Irnina ("victory"), though this epithet could be applied to other deities as well, in addition to functioning as a distinct goddess linked to Ningishzida rather than to Ishtar. Another epithet highlighting this aspect of Ishtar's nature was Anunitu ("the martial one"). Like Irnina, Anunitu could also be a separate deity, and as such she is first attested in documents from the Ur III period.

Assyrian royal curse-formulas invoked both of Ishtar's primary functions at once, invoking her to remove potency and martial valor alike. Mesopotamian texts indicate that traits perceived as heroic (such as a king's ability to lead his troops and to triumph over enemies) and sexual prowess were regarded as interconnected.

While generally classified as a goddess, Inanna/Ishtar could seem at times to have ambiguous gender. Gary Beckman states that "ambiguous gender identification" was a characteristic not just of Ishtar herself but of a category of deities he refers to as "Ishtar type" goddesses (such as Shaushka, Pinikir or Ninsianna). A late hymn contains the phrase "she [Ishtar] is Enlil, she is Ninil" which might be a reference to occasionally "dimorphic" character of Ishtar, in addition to serving as an exaltation. A hymn to Nanaya alludes to a male aspect of Ishtar from Babylon alongside a variety of more standard descriptions. However, Ilona Zsolnay only describes Ishtar as a "feminine figure who performed a masculine role" in certain contexts, for example as a war deity.

Inanna's twin brother was Utu (known as Shamash in Akkadian), the god of the sun and justice. In Sumerian texts, Inanna and Utu are depicted as extremely close; some modern authors even perceive their relationship as bordering on incestuous. In the myth of her descent into the underworld, Inanna addresses Ereshkigal, the queen of the underworld, as her "older sister," yet the two goddesses almost never appear together elsewhere in Sumerian literature and were not placed in the same category in god lists. In some Neo-Assyrian sources, Ishtar is also associated with Adad, with the relationship mirroring that between Shaushka and her brother Teshub in Hurrian mythology.

The most common tradition regarded Nanna and his wife Ningal as her parents. Examples of it are present in sources as diverse as a god list from the Early Dynastic period, a hymn of Ishme-Dagan relaying how Enlil and Ninlil bestowed Inanna's powers upon her, a late syncretic hymn to Nanaya, and an Akkadian ritual from Hattusa. While some authors assert that in Uruk Inanna was usually regarded as the daughter of the sky god An, it is possible that references to him as her father are only referring to his status as an ancestor of Nanna and thus his daughter. In literary texts, Enlil or Enki may be addressed as her fathers but references to major gods being "fathers" can also be examples of the use of this word as an epithet indicating seniority.

Dumuzid (later known as Tammuz), the god of shepherds, is usually described as Inanna's husband, but according to some interpretations Inanna's loyalty to him is questionable; in the myth of her descent into the Underworld, she abandons Dumuzid and permits the galla demons to drag him down into the underworld as her replacement. In a different myth, The Return of Dumuzid Inanna instead mourns over Dumuzid's death and ultimately decrees that he will be allowed to return to Heaven to be with her for one half of the year. Dina Katz notes that the portrayal of their relationship in Inanna's Descent is unusual; it does not resemble the portrayal of their relationship in other myths about Dumuzi's death, which almost never pin the blame for it on Inanna, but rather on demons or even human bandits. A large corpus of love poetry describing encounters between Inanna and Dumuzi has been assembled by researchers. However, local manifestations of Inanna/Ishtar were not necessarily associated with Dumuzi. In Kish, the tutelary deity of the city, Zababa (a war god), was viewed as the consort of a local hypostasis of Ishtar, though after the Old Babylonian period Bau, introduced from Lagash, became his spouse (an example of a couple consisting out of a warrior god and a medicine goddess, common in Mesopotamian mythology) and Ishtar of Kish started to instead be worshipped on her own.

Inanna is not usually described as having any offspring; however, in the myth of Lugalbanda, as well as in a single building inscription from the Third Dynasty of Ur (c. 2112 – c. 2004 BCE), the warrior god Shara is described as her son. She was also sometimes considered the mother of Lulal, who is described in other texts as the son of Ninsun. Wilfred G. Lambert described the relation between Inanna and Lulal as "close but unspecified" in the context of Inanna's Descent. There is also similarly scarce evidence for the love goddess Nanaya being regarded as her daughter, but it is possible all of these instances merely refer to an epithet indicating closeness between the deities and were not a statement about actual parentage.

Inanna's sukkal was the goddess Ninshubur, whose relationship with Inanna is one of mutual devotion. In some texts, Ninshubur is listed right after Dumuzi as a member of Inanna's circle, even before some of her relatives; in one text the phrase "Ninshubur, beloved vizier" appears. In another text Ninshubur is listed even before Nanaya, originally possibly a hypostasis of Inanna herself, in a list of deities from her entourage. In an Akkadian ritual text known from Hittite archives, Ishtar's sukkal is invoked alongside her family members Sin, Ningal, and Shamash.

Other members of Inanna's entourage frequently listed in god lists are the goddesses Nanaya, Kanisurra, Gazbaba, and Bizila, all of them also associated with each other in various configurations independently from this context.

In addition to the full conflation of Inanna and Ishtar during the reign of Sargon and his successors, she was syncretised with a large number of deities to a varying degree. The oldest known syncretic hymn is dedicated to Inanna, and has been dated to the Early Dynastic period. Many god lists compiled by ancient scribes contained entire "Inanna group" sections enumerating similar goddesses, and tablet IV of the monumental god list An-Anum (7 tablets total) is known as the "Ishtar tablet" due to most of its contents being the names of Ishtar's equivalents, her titles and various attendants. Some modern researchers use the term Ishtar-type to define specific figures of this variety. Some texts contained references to "all the Ishtars" of a given area.

In later periods Ishtar's name was sometimes used as a generic term ("goddess") in Babylonia, while a logographic writing of Inanna was used to spell the title Bēltu, leading to further conflations. A possible example of such use of the name is also known from Elam, as a single Elamite inscription written in Akkadian refers to "Manzat-Ishtar", which might in this context mean "the goddess Manzat".

Ashtart

In cities like Mari and Ebla, the Eastern and Western Semitic forms of the name (Ishtar and Ashtart) were regarded as basically interchangeable. However, the western goddess evidently lacked the astral character of Mesopotamian Ishtar. Ugaritic god lists and ritual texts equate the local Ashtart with both Ishtar and Hurrian Ishara.

Ishara

Due to association with Ishtar, the Syrian goddess Ishara started to be regarded as a "lady of love" like her (and Nanaya) in Mesopotamia. However, in Hurro-Hittite context Ishara was associated with the underworld goddess Allani instead and additionally functioned as a goddess of oaths.

Nanaya

A goddess uniquely closely linked to Inanna, as according to assyriologist Frans Wiggermann her name was originally an epithet of Inanna (possibly serving as an appellative, "My Inanna!"). Nanaya was associated with erotic love, but she eventually developed a warlike aspect of her own too ("Nanaya Euršaba"). In Larsa Inanna's functions were effectively split between three separate figures and she was worshipped as part of a trinity consisting out of herself, Nanaya (as a love goddess) and Ninsianna (as an astral goddess). Inanna/Ishtar and Nanaya were often accidentally or intentionally conflated in poetry.

Ninegal

While she was initially an independent figure, starting with Old Babylonian period in some texts "Ninegal" is used as a title of Inanna, and in god lists she was a part of the "Inanna group" usually alongside Ninsianna. An example of the usage of "Ninegal" as an epithet can be found in the text designated as Hymn to Inana as Ninegala (Inana D) in the ETCSL.

Ninisina

A special case of syncretism was that between the medicine goddess Ninisina and Inanna, which occurred for political reasons. Isin at one point lost control over Uruk and identification of its tutelary goddess with Inanna (complete with assigning a similar warlike character to her), who served as a source of royal power, was likely meant to serve as a theological solution of this problem. As a result, in a number of sources Ninisina was regarded as analogous to similarly named Ninsianna, treated as a manifestation of Inanna. It is also possible that a ceremony of "sacred marriage" between Ninisina and the king of Isin had been performed as a result.

Ninsianna

A Venus deity of varying gender. Ninsianna was referred to as male by Rim-Sin of Larsa (who specifically used the phrase "my king") and in texts from Sippar, Ur, and Girsu, but as "Ishtar of the stars" in god lists and astronomical texts, which also applied Ishtar's epithets related to her role as a personification of Venus to this deity. In some locations Ninsianna was also known as a female deity, in which case her name can be understood as "red queen of heaven".

Pinikir

Originally an Elamite goddess, recognised in Mesopotamia, and as a result among Hurrians and Hittites, as an equivalent of Ishtar due to similar functions. She was identified specifically as her astral aspect (Ninsianna) in god lists. In a Hittite ritual she was identified by the logogram IŠTAR and Shamash, Suen and Ningal were referred to as her family; Enki and Ishtar's sukkal were invoked in it as well. in Elam she was a goddess of love and sex and a heavenly deity ("mistress of heaven"). Due to syncretism with Ishtar and Ninsianna Pinikir was referred to as both a female and male deity in Hurro-Hittite sources.

Šauška

Her name was frequently written with the logogram IŠTAR in Hurrian and Hittite sources, while Mesopotamian texts recognised her under the name "Ishtar of Subartu". Some elements peculiar to her were associated with the Assyrian hypostasis of Ishtar, Ishtar of Nineveh, in later times. Her handmaidens Ninatta and Kulitta were incorporated into the circle of deities believed to serve Ishtar in her temple in Ashur.

The poem Enki and the World Order (ETCSL 1.1.3) begins by describing the god Enki and his establishment of the cosmic organization of the universe. Towards the end of the poem, Inanna comes to Enki and complains that he has assigned a domain and special powers to all of the other gods except for her. She declares that she has been treated unfairly. Enki responds by telling her that she already has a domain and that he does not need to assign her one.

The myth of "Inanna and the Huluppu Tree", found in the preamble to the epic of Gilgamesh, Enkidu, and the Netherworld (ETCSL 1.8.1.4), centers around a young Inanna, not yet stable in her power. It begins with a huluppu tree, which Kramer identifies as possibly a willow, growing on the banks of the river Euphrates. Inanna moves the tree to her garden in Uruk with the intention to carve it into a throne once it is fully grown. The tree grows and matures, but the serpent "who knows no charm", the Anzû-bird, and Lilitu (Ki-Sikil-Lil-La-Ke in Sumerian), seen by some as the Sumerian forerunner to the Lilith of Jewish folklore, all take up residence within the tree, causing Inanna to cry with sorrow. The hero Gilgamesh, who, in this story, is portrayed as her brother, comes along and slays the serpent, causing the Anzû-bird and Lilitu to flee. Gilgamesh's companions chop down the tree and carve its wood into a bed and a throne, which they give to Inanna, who fashions a pikku and a mikku (probably a drum and drumsticks respectively, although the exact identifications are uncertain), which she gives to Gilgamesh as a reward for his heroism.

The Sumerian hymn Inanna and Utu contains an etiological myth describing how Inanna became the goddess of sex. At the beginning of the hymn, Inanna knows nothing of sex, so she begs her brother Utu to take her to Kur (the Sumerian underworld), so that she may taste the fruit of a tree that grows there, which will reveal to her all the secrets of sex. Utu complies and, in Kur, Inanna tastes the fruit and becomes knowledgeable. The hymn employs the same motif found in the myth of Enki and Ninhursag and in the later Biblical story of Adam and Eve.

The poem Inanna Prefers the Farmer (ETCSL 4.0.8.3.3) begins with a rather playful conversation between Inanna and Utu, who incrementally reveals to her that it is time for her to marry. She is courted by a farmer named Enkimdu and a shepherd named Dumuzid. At first, Inanna prefers the farmer, but Utu and Dumuzid gradually persuade her that Dumuzid is the better choice for a husband, arguing that, for every gift the farmer can give to her, the shepherd can give her something even better. In the end, Inanna marries Dumuzid. The shepherd and the farmer reconcile their differences, offering each other gifts. Samuel Noah Kramer compares the myth to the later Biblical story of Cain and Abel because both myths center around a farmer and a shepherd competing for divine favor and, in both stories, the deity in question ultimately chooses the shepherd.

Inanna and Enki (ETCSL t.1.3.1) is a lengthy poem written in Sumerian, which may date to the Third Dynasty of Ur (c. 2112 BCE – c. 2004 BCE); it tells the story of how Inanna stole the sacred mes from Enki, the god of water and human culture. In ancient Sumerian mythology, the mes were sacred powers or properties belonging to the gods that allowed human civilization to exist. Each me embodied one specific aspect of human culture. These aspects were very diverse and the mes listed in the poem include abstract concepts such as Truth, Victory, and Counsel, technologies such as writing and weaving, and also social constructs such as law, priestly offices, kingship, and prostitution. The mes were believed to grant power over all the aspects of civilization, both positive and negative.

In the myth, Inanna travels from her own city of Uruk to Enki's city of Eridu, where she visits his temple, the E-Abzu. Inanna is greeted by Enki's sukkal, Isimud, who offers her food and drink. Inanna starts up a drinking competition with Enki. Then, once Enki is thoroughly intoxicated, Inanna persuades him to give her the mes. Inanna flees from Eridu in the Boat of Heaven, taking the mes back with her to Uruk. Enki wakes up to discover that the mes are gone and asks Isimud what has happened to them. Isimud replies that Enki has given all of them to Inanna. Enki becomes infuriated and sends multiple sets of fierce monsters after Inanna to take back the mes before she reaches the city of Uruk. Inanna's sukkal Ninshubur fends off all of the monsters that Enki sends after them. Through Ninshubur's aid, Inanna successfully manages to take the mes back with her to the city of Uruk. After Inanna escapes, Enki reconciles with her and bids her a positive farewell. It is possible that this legend may represent a historic transfer of power from the city of Eridu to the city of Uruk. It is also possible that this legend may be a symbolic representation of Inanna's maturity and her readiness to become the Queen of Heaven.

The poem Inanna Takes Command of Heaven is an extremely fragmentary, but important, account of Inanna's conquest of the Eanna temple in Uruk. It begins with a conversation between Inanna and her brother Utu in which Inanna laments that the Eanna temple is not within their domain and resolves to claim it as her own. The text becomes increasingly fragmentary at this point in the narrative, but appears to describe her difficult passage through a marshland to reach the temple while a fisherman instructs her on which route is best to take. Ultimately, Inanna reaches her father An, who is shocked by her arrogance, but nevertheless concedes that she has succeeded and that the temple is now her domain. The text ends with a hymn expounding Inanna's greatness. This myth may represent an eclipse in the authority of the priests of An in Uruk and a transfer of power to the priests of Inanna. Beside the epic text, the descent of the Eanna from heaven is mentioned in the story of Gilgameš and Akka (line 31) as well as the Sumerian Temple hymns and the bilingual text The Exaltation of Inanna/Ištar.

Inanna briefly appears at the beginning and end of the epic poem Enmerkar and the Lord of Aratta (ETCSL 1.8.2.3). The epic deals with a rivalry between the cities of Uruk and Aratta. Enmerkar, the king of Uruk, wishes to adorn his city with jewels and precious metals, but cannot do so because such minerals are only found in Aratta and, since trade does not yet exist, the resources are not available to him. Inanna, who is the patron goddess of both cities, appears to Enmerkar at the beginning of the poem and tells him that she favors Uruk over Aratta. She instructs Enmerkar to send a messenger to the lord of Aratta to ask for the resources Uruk needs. The majority of the epic revolves around a great contest between the two kings over Inanna's favor. Inanna reappears at the end of the poem to resolve the conflict by telling Enmerkar to establish trade between his city and Aratta.

Inanna and her brother Utu were regarded as the dispensers of divine justice, a role which Inanna exemplifies in several of her myths. Inanna and Ebih (ETCSL 1.3.2), otherwise known as Goddess of the Fearsome Divine Powers, is a 184-line poem written by the Akkadian poet Enheduanna describing Inanna's confrontation with Mount Ebih, a mountain in the Zagros mountain range. The poem begins with an introductory hymn praising Inanna. The goddess journeys all over the entire world, until she comes across Mount Ebih and becomes infuriated by its glorious might and natural beauty, considering its very existence as an outright affront to her own authority. She rails at Mount Ebih, shouting:

Mountain, because of your elevation, because of your height,
Because of your goodness, because of your beauty,
Because you wore a holy garment,
Because An organized(?) you,
Because you did not bring (your) nose close to the ground,
Because you did not press (your) lips in the dust.

Inanna petitions to An, the Sumerian god of the heavens, to allow her to destroy Mount Ebih. An warns Inanna not to attack the mountain, but she ignores his warning and proceeds to attack and destroy Mount Ebih regardless. In the conclusion of the myth, she explains to Mount Ebih why she attacked it. In Sumerian poetry, the phrase "destroyer of Kur" is occasionally used as one of Inanna's epithets. According to Annette Zgoll, in this text Inanna represents the expansive conquest policy of the Akkadian empire, while the reluctant behaviour of the god An represents the perspective of the land of Sumer and its inhabitants, who had to suffer under the Sargonid invasions. The rebellion of the mountain of Ebiḫ and its destruction by Inanna is also mentioned in the hymn Innin ša gura ("Mistress of the Great Heart"), which is ascribed to the high priestess En-ḫedu-ana.

The poem Inanna and Shukaletuda (ETCSL 1.3.3) begins with a hymn to Inanna, praising her as the planet Venus. It then introduces Shukaletuda, a gardener who is terrible at his job. All of his plants die, except for one poplar tree. Shukaletuda prays to the gods for guidance in his work. To his surprise, the goddess Inanna sees his one poplar tree and decides to rest under the shade of its branches. Shukaletuda removes her clothes and rapes Inanna while she sleeps. When the goddess wakes up and realizes she has been violated, she becomes furious and determines to bring her attacker to justice. In a fit of rage, Inanna unleashes horrible plagues upon the Earth, turning water into blood. Shukaletuda, terrified for his life, pleads his father for advice on how to escape Inanna's wrath. His father tells him to hide in the city, amongst the hordes of people, where he will hopefully blend in. Inanna searches the mountains of the East for her attacker, but is not able to find him. She then releases a series of storms and closes all roads to the city, but is still unable to find Shukaletuda, so she asks Enki to help her find him, threatening to leave her temple in Uruk if he does not. Enki consents and Inanna flies "across the sky like a rainbow". Inanna finally locates Shukaletuda, who vainly attempts to invent excuses for his crime against her. Inanna rejects these excuses and kills him. Theology professor Jeffrey Cooley has cited the story of Shukaletuda as a Sumerian astral myth, arguing that the movements of Inanna in the story correspond with the movements of the planet Venus. He has also stated that, while Shukaletuda was praying to the goddess, he may have been looking toward Venus on the horizon.

The text of the poem Inanna and Bilulu (ETCSL 1.4.4), discovered at Nippur, is badly mutilated and scholars have interpreted it in a number of different ways. The beginning of the poem is mostly destroyed, but seems to be a lament. The intelligible part of the poem describes Inanna pining after her husband Dumuzid, who is in the steppe watching his flocks. Inanna sets out to find him. After this, a large portion of the text is missing. When the story resumes, Inanna is being told that Dumuzid has been murdered. Inanna discovers that the old bandit woman Bilulu and her son Girgire are responsible. She travels along the road to Edenlila and stops at an inn, where she finds the two murderers. Inanna stands on top of a stool and transforms Bilulu into "the waterskin that men carry in the desert", forcing her to pour the funerary libations for Dumuzid.