Sitapur (Hindi: सीतापुर, Urdu: سیتا پور) formerly spelled Citapore is a town and a municipal board in Sitapur district in the state of Uttar Pradesh, India. It is in the Lucknow Division. The town is by the river Sarayan, half-way between Lucknow and Shahjahanpur on the Lucknow-Delhi National Highway No. 24 and on the Lucknow-Bareilly Railway, 89 km northwest from the state capital, Lucknow. In British India it was spelled as Citapore and was a cantonment, garrisoned by a portion of a British regiment. The traditional origin for the name is said to be by the King Vikramāditya from Lord Ram's wife Sita.

Sitapur has a long history. It is a land of seers and sufis and dalits. According to Hindu mythology, purans were written by Rishi Ved Vyas (Vyas Gaddi) on the ancient location called Naimisharanya. Sitapur is one of the five sacred places the Hindus have to visit in their Panch Dham Yatra journey. Misrikh, near Naimisharanya, holds its religious significance due to the belief that Maharshi Dadhichi donated his bones to Devatas for making Vajras. Dargah of Hazrat Maqdoom Shaikh Shaduddin (Bada Maqdoom) at Khairabad and Hazrat Gulzar Shah are the symbols of communal harmony. According to Abdul Fazal's Aina Akbari this place was called Chatyapur or Chitiapur during the reign of Akbar.