Lubań [ˈlubaɲ] (German: Lauban; Czech: Lubáň), sometimes called Lubań Śląski (English: Silesian Lubań; Upper Sorbian: Lubań Šlešćina, pronounced [ˈlubajn ˈʃlɛʃtʃina]); is a town in the Lower Silesian Voivodeship in southwest Poland. It is the administrative seat of Lubań County and also of the smaller Gmina Lubań (although it is not part of the territory of the latter, as the town is a separate urban gmina in its own right).

Situated north of the Jizera Mountains on the western shore of the Kwisa River, Lubań is considered part of the historic Upper Lusatia region, although it was more closely associated with Lower Silesia in the early 14th century and from 1815. It is located about 25 km (16 mi) east of Zgorzelec/Görlitz and about 45 km (28 mi) northwest of Jelenia Góra.

The town probably is at the site of a small settlement established by the West Slavic Bieżuńczanie tribe, one of the old Polish tribes, in the 9th and 10th century. Bieżuńczanie together with the Sorbian Milceni tribe, with whom they bordered in the west, were subjugated in 990 by the Margraviate of Meissen. From 1002 to 1031, the area was part of Piast-ruled Poland. In 1156, Holy Roman Emperor Frederick Barbarossa vested his ally, the Přemyslid duke Vladislaus II of Bohemia with the territory around Bautzen (Budissin), then called "Milsko", and after the 15th century called "Upper Lusatia".

Luban was granted town rights with Magdeburg rights in the course of the German Ostsiedlung. It was first mentioned in 1268. Like several other town foundings under the rule of the Přemyslid dynasty, owing to its favourable location on the historic Via Regia trade route close to the border with the Duchy of Silesia, Luban expanded rapidly. Since about 1253, Upper Lusatia temporarily had been under the rule of the Ascanian margraves John I and Otto III of Brandenburg. By the end of the 13th century, Luban's first brewery was founded by the Franciscans and cloth production flourished thanks to Flemish settlers. In 1297, a clothiers' uprising took place, which was brutally suppressed. Its two leaders were beheaded at the market square.

In 1319, the town became part of the Duchy of Jawor, the southwesternmost duchy of fragmented Piast-dynasty Poland. Duke Henry I of Jawor built a new town hall, the ruins of which can be seen today (Kramarska Tower). In 1320, he founded a Magdalene monastery in Lubań. He appointed a separate wójt for the town, which to that point administratively was subordinate to the wójt of Zgorzelec. The centre of the medieval town was a square marketplace with perpendicular streets, leading to four gates: Görlitzer Tor (Zgorzelecka) to the west, Brüdertor (Bracka), built in 1318 together with stone curtains by Duke Henry of Jawor, to the south, Nikolaitor (Mikołajska) to the east and Naumburger Tor (Nowogrodziecka) to the north. The first mayor of the town was Nikolaus Hermann, and Luban received its own seal.

In 1346, the town passed to the Bohemian Crown. Under the rule of Bohemian king Charles IV of Luxembourg, Luban on 10 August 1346 established the Lusatian League, together with the towns of Budissin (Upper Sorbian: Budyšin), Görlitz (Zhorjelc), Kamenz (Kamjenc), Löbau (Lubij) and Zittau (Žitawa). Twice however, in 1427 and 1431, the Hussites completely demolished the town; it was quickly rebuilt. In its history, the town has repeatedly suffered great fires, which often ruined the whole town. Many inhabitants died as a result of plagues. In 1437, Bohemian King Sigismund exempted the town from taxes for 15 years.

In 1469, Luban became part of Hungary. In 1490, it became again part of the Kingdom of Bohemia, now ruled by the Jagiellonian dynasty, and after 1526 by the House of Habsburg. In 1498, Bohemian King Vladislaus II established an annual eight-day fair. In the 15th and 16th century, brewing prospered, with local beer being popular throughout Lusatia and Silesia, it was even served in the famous Piwnica Świdnicka in Breslau (Wrocław).

In 1628, Bohemian military leader Albrecht von Wallenstein visited the town. With the 1635 Peace of Prague, the Habsburg Emperor Ferdinand II in his capacity as Bohemian king passed Lusatia with the town to the Electorate of Saxony. As a result of the Thirty Years' War, the local economy collapsed, and in 1659, 1670 and 1696 the town was hit by fires.

Residents celebrated the election of Augustus II the Strong as king of Poland and the formation of the Polish-Saxon union in 1697. During August II's visit to the town just before his royal coronation, a parade of the town's self-defense troops was held. With the union came prosperity. The town prospered due to linen and cloth production as well as trade in Polish oxen. During his rule, the Dom pod Okrętem ("House under the Ship") was built. August II visited the town once again in 1721. The 1733 royal election of his son August III of Poland was celebrated even more grandly, with five parades of municipal self-defense troops taking place.

Following the Napoleonic wars, in 1815 the Lusatian territory around Lauban and Görlitz fell to the Kingdom of Prussia after the Vienna Congress and was incorporated into the Province of Silesia. In 1865 and 1866, Lauban obtained railway connections with Görlitz and Hirschberg (Jelenia Góra). Following the unification of Germany in 1871, the town became part of the German Empire.

During World War I, Lauban was the site of a large prisoner-of-war camp, whose first prisoners, from September 1914, were soldiers of Imperial Russia, including Poles and Georgians conscripted into the Russian army (large parts of Polish and Georgian lands were under Russian rule before regaining independence by both countries in 1918). From 1915, French soldiers as well as political prisoners and common criminals were also imprisoned there. Aleksandra Szczerbińska, the future wife of the leader of interwar Poland Józef Piłsudski, was imprisoned there in 1916. Józef Piłsudski and Aleksandra Piłsudska are today commemorated in Lubań with a memorial stone. During World War II, the Nazis created numerous forced labor camps in the town, the largest of which was Wohnheimlager GEMA, in which Polish and Russian women were imprisoned. Polish and Russian women were imprisoned also in other camps, as well as Russians, Hungarians, Frenchmen, Latvians and Ukrainians. The present-day district of Księginki was the location of the E231 labor subcamp of the Stalag VIII-B/344 prisoner-of-war camp for Allied POWs.

Lauban was the site of one of the last Nazi German victories in World War II. After it was taken in the Upper Silesian Offensive by the Red Army on 16 February 1945, the Wehrmacht successfully retook the town in a counterattack on 8 March 1945. After the war, the town became again part of Poland in accordance with the Potsdam Agreement and was renamed to its historic Polish name Lubań. In 1945–46, the remaining German inhabitants were expelled, also in accordance with the Potsdam Agreement, and the town was repopulated by Poles, including expellees from former eastern Poland, which was annexed by the Soviet Union. In the 1950s Greeks, refugees of the Greek Civil War, settled in the town and its vicinity.

From 1975 to 1998 it was part of the former Jelenia Góra Voivodeship. Between 1992 and 2004, the marketplace was renovated. Streets were paved and town houses around the Kramarska Tower were rebuilt.

There are the following workplaces in Lubań:

• Przedsiębiorstwo Energetyki Cieplnej (PEC Lubań Sp. z o.o.)
• Agromet ZEHS Lubań
• Imakon Sp. z o.o.
• „IMKA" Dr. Schumacher Sp. z o.o.
• Chromex Sp. z o.o.
• Automatec Sp. z o.o.

There are also the following notable companies:

• Lubańskie Przedsiębiorstwo Wodociągów i Kanalizacji Sp. z o.o. Lubań
• Lubańskie Towarzystwo Budownictwa Społecznego Sp. z o.o. Lubań
• Przedsiębiorstwo Energetyki Cieplnej Sp. z o.o. Lubań
• Zakład Gospodarki i Usług Komunalnych Sp. z o.o. Lubań

In terms of entertainment and consumption, the town offers clubs, restaurants, swimming pools, a cinema and a small modern shopping centre.

Lubań is the hub of culture in the Lubań Municipality. The town has a cultural centre (Dom Kultury). There is also a regional museum.

Lubań is a stop on the Polish sections of the Way of St. James pilgrimage route.

Lubań has five kindergartens, five primary schools, and three secondary schools.

The Adam Mickiewicz Post-Primary School Complex (Zespół Szkół Ponadpodstawowych im. Adama Mickiewicza w Lubaniu) is ranked amongst the best secondary schools in the entire Lower Silesian Voivodeship.

Lubań has a hospital, the Lucjan Kopeć Lusatian Medical Centre (Łużyckie Centrum Medyczne im. Lucjana Kopcia).

Lubań has a bus station and a train station.

Since 2011, a public transport system functions in the town.

The Polish national road 30, and Voivodeship roads 296, 357, 393 pass through the town.