Sitarganj is a city and a municipal board in Udham Singh Nagar district in the Indian state of Uttarakhand. Now it is home to the Integrated Industrial Estate Sitarganj (IIE) being developed by State Industrial Development Corporation of Uttarakhand Limited (SIDCUL).

Udham Singh Nagar is a district of Uttarakhand state in northern India. Rudrapur is the district headquarter. The district consists of nine Tehsils named Bajpur, Gadarpur, Jaspur, Kashipur, Khatima, Kichha, Nanakmatta, Rudrapur, Sitarganj. The district is located in the Terai region, and is part of Kumaon Division. It is bounded on the north by Nainital District, on the northeast by Champawat District, on the east by Nepal, and on the south and west by Bareilly, Rampur, Moradabad, Pilibhit and Bijnor District of Uttar Pradesh state. The district was created on 29 September 1995, by Mayawati government out of Nainital District. It is named for freedom fighter and Indian revolutionary Udham Singh.