Bharatiya Janata Party ally Apna Dal (Sonelal) candidate Rinki Kol won the Chhanbey seat by defeating her closes rival Keerti Kol of the Samajwadi Party by a significant margin of over 9,000 votes.
Meanwhile, Apna Dal (S) candidate Shafeek Ahmed Ansari won the Suar seat, defeating SP's Anuradha Chauhan by a significant margin of 8,724 votes.
Bypolls to the two Assembly segments were held on 10 May, and the counting for the same is underway on Saturday, 13 May.
The Chhanbey seat in Uttar Pradesh's Mirzapur district fell vacant after the death of Apna Dal (Sonelal) MLA Rahul Prakash Kol in February this year.
The Suar Assembly seat in Rampur district also fell vacant in February after SP leader Azam Khan's son Abdullah Azam Khan was disqualified as an MLA after a Moradabad court sentenced him to two years in prison in a 15-year-old case.
There has been a direct contest between the ruling coalition led by the BJP and the opposition Samajwadi Party in both seats.