Samajwadi Party candidate Dimple Yadav on Thursday won the Mainpuri parliamentary bypoll in Uttar Pradesh, defeating her nearest rival and BJP candidate Raghuraj Singh Shakya by 2,88,461 votes.

Considered as the SP's bastion, the seat was held by party founder and Dimple Yadav's father-in-law Mulayam Singh Yadav and got vacated after his death on October 10.