Harraiya is a constituency of the Uttar Pradesh Legislative Assembly covering the city of Harraiya in the Basti district of Uttar Pradesh India.
Harraiya is one of five assembly constituencies in the Basti Lok Sabha constituency. Since 2008, this assembly constituency is numbered 307 amongst 403 constituencies.
Currently this seat belongs to Bharatiya Janta Party candidate Ajay Kumar Singh who won in last Assembly election of 2017 Uttar Pradesh Legislative Elections defeating Samajwadi Party candidate Raj Kishor Singh by a margin of 30,106 votes.