Puranpur Assembly constituency is one of the 403 constituencies of the Uttar Pradesh Legislative Assembly, India. It is a part of the Pilibhit district and one of the five assembly constituencies in the Pilibhit Lok Sabha constituency. First election in this assembly constituency was held in 1962 after the "DPACO (1961)" (delimitation order) was passed in 1961. After the "Delimitation of Parliamentary and Assembly Constituencies Order" was passed in 2008, the constituency was assigned identification number 129.

Extent of Puranpur Assembly constituency is KCs North, South, East, Jograjpur, PCs Amraiya Kalan, Keshopur T.Anandpur, Khamaria Patti, Chandupur, Takia Deenarpur, Puranpur Khas, Fazilpur of West KC, Kalinagar NP & Puranpur MB of Puranpur Tehsil. Largest Village Sherpur Kalan.