Dewaitha (also written as Diwaitha, Divaitha or Deoitha) is a village of Dildarnagar Kamsar,in Zamania tehsil of Ghazipur, India, located on the banks of the Karmanasa River and it's tributary Eknaiya, The village had a population of 7,104 as of the 2011 Census of India. The place is inhabited by Kamsar Pathans. .

Dewaitha, formerly known as Daudpur is a historic village established by Dewan Sarkar Raja Daud Khan Zamindar a great-grandson of Narhar Khan the founder of Kamsar region. Narhar's third son, Bahbal Khan had five sons who founded several villages in the Kamsar region. His youngest son Chand Khan receiving his share of estate, established Jaburna. He later distributed his estate among his five sons name as Daud Khan, Hateem Khan, Tajat Khan, Qasim Khan, and Taj Khan .His sons, Hateem & Tajat Khan settled at Jaburna, Qasim Khan founded, nearby Karmahari and Baraura, although his descendants moved to Daltonganj and founder 11 villages there, abandoning the place. Taj Khan founded the hamlet, Kesruva. Taj Khan was without issue so his estate was transferred to his brothers. Daud Khan founded Dewaitha in 1605 AD.

Daud Khan's cousin, Raja Sarkar Dewan Quttul Khan Zamindar Jagirdar taluka Seorai, played a pivotal role in the region’s history by re-establishing the jagir of his great-grandfather, Raja Narhar Khan, known as Kamsar Jagir, a vast estate of 52 villages, and constructing a fort at Seorai during Akbar's reign. However, Quttul Khan was killed in a conflict with Man Singh Rai of Reotipur. Daud Khan avenged his cousin’s death, and succeeded him as the Dewan of the Subah appointed by Jahangir, consolidating his authority as the jagirdar of the pargana. He expanded his ancestral lands, creating the Daudpur Zamindari estate, spread across Dewaitha to Zamania, with its administrative center fort (kot) at Dewaitha, in early 1600s, attaining the title of Raja ,now only a small part of kot remains in Kot Muhalla. He also build a Mosque, a Edigah and planted orchard which consisted thousands of trees. He gave his name to nearby mauza ,Daudpur, his eldest son Mahmud Khan established Rasulpur, and his second son Kabir Khan, gave his name to Kabirpur(Rohura), although most of Kabir's desendants later migrated to Akhlashpur, because of family relations.

The estate flourished under successive generations, notably Raja Yad Ali Khan a sixth-generation descendant, who solidified its prominence. He received a title of Nawab and rais, by the British, which continued in his family. Yad Ali's elder brother, Qadir Khan, is remembered through the nearby hamlet of Qadirpur. During his time estate boundaries touched the borders of zamindari of Amil Chaudhary Azmal of Zamania, he died in 1837AD giving the estate to his eldest grandson Khuda Bhaksh. During the 1857 rebellion, lead by Kunwar singh, Raja Khuda Bhaksh Khan, taluqdar of estate, also led the Kamsaries in the uprising, with his brothers, one of whom, Akbar Khan attaining martyrdom. During the rebellion there was outrage between the zamindars of the region regarding forced cultivation of Opium. After Khuda Bhaksh, his younger brother Amir Khan succeeded him. Dewaitha being a junction of two places, Zamania and Dildarnagar, got name Dewaitha, derived from "Dwi (द्वि): Means "two" or "dual."Aitha: related to something like "coming" or "arrival."Together, "Diwaitha" could meant "a place of two arrivals" or "a junction of two paths and so, the name was registered as Diwaitha.

Under British rule, some parts of the Kamsar region fell under the jurisdiction of Amil Deokinandan (Kusi &Usia) and 37 villages taluka to Gaighat, under, Vizianagaram Estate. The Daudpur estate, became small consisting 18 mouzas nearby Dewaitha, but remained under the cheiftiancy control of the family with co-operation, till zamindari abolishment in 1956. Muhammad Wasil Khan , the estate's last chief and taluqdar, became the first pradhan of Dewaitha. He established the village’s first primary school and a private medical centre which was operated by a trust of Yad's descendants, Yad Ali's family is known as Athoghar. "In 1940, 502 gold coins were excavated from the village of whom 96 were of Gupta dynasty. The village also celebrates the Urs of a sufi saint, named Sabir Shah, every year, in the old kot where he lived, Sabir Shah was from Beenapara, though he and his brother lived at Dewaitha, his mazar is at Biur, near Chainpur, while his brother is buried at the Eidgah here.

Devaitha is a prominent village situated in the Zamania Tehsil of Ghazipur district, Uttar Pradesh. It is home to 917 families, with a total population of 7,104 as recorded in the 2011 Census. Of this population, 3,685 are males and 3,419 are females.

The number of children aged 0-6 years in Devaitha is 1,131, comprising 15.92% of the village’s total population. The average sex ratio in Devaitha is 928 females per 1,000 males, which is higher than the Uttar Pradesh state average of 912. The child sex ratio, at 988, also exceeds the state average of 902.

Devaitha boasts a literacy rate of 76.04%, surpassing the state’s average of 67.68% as per the 2011 Census. Male literacy in the village is notably high at 87.20%, while the female literacy rate stands at 63.88%.

Under the Constitution of India and the Panchayati Raj Act, Devaitha is governed by a Pradhan (village head), who is an elected representative.The village has many mahallas like, Kot Muhallah(inside the old kot), Haji Muhallah, Athoghar and Purab, pachim Uttar, Dakhin, muhallas. The total number of people belonging to Shedule caste was 1203, white shedule tributary was 25. The literary reate was 76.04% , male 87.2% & female73.88 percent.

Scheduled Castes (SC) make up 16.93% of the population in Devaitha, while Scheduled Tribes (ST) account for a mere 0.35% of the total population.

In Devaitha, 1,381 residents are involved in various work activities. Among them, 43.74% are engaged in primary employment (work lasting more than six months in a year), while 56.26% participate in marginal work, providing livelihood for less than six months annually. Of those engaged in primary employment, 130 are cultivators (either owners or co-owners of land), and 30 work as agricultural laborers.

• Dildarnagar Kamsar
• Karmahari
• Jaburna
• Fufuao
• Daudpur (village)
• Daudpur Estate