Unchahar is a constituency of the Uttar Pradesh Legislative Assembly covering the city of Unchahar in the Rae Bareli district of Uttar Pradesh, India. Unchahar is one of five assembly constituencies in the Lok Sabha constituency of Rae Bareli. It was established as instructed by the Delimitaion Order 2008. It is number 183 among the constituencies of Uttar Pradesh Legislative Assembly.