Sanjay Kumar Singh (born 12 April 1979) is an Indian politician and businessman from Bihar. He currently serves as the Minister for public health engineering of Bihar. He is the sitting Member of the Bihar Legislative Assembly from the Mahua Assembly constituency, elected for the first time in the 2025 Bihar Legislative Assembly election. He is a member of the Lok Janshakti Party (Ram Vilas), and is considered close to party national president and Union Minister Chirag Paswan.
Sanjay Kumar Singh was born on 12 April 1979 in Mahua, Vaishali district, Bihar. He completed his graduation in 2016 from Babasaheb Bhimrao Ambedkar Bihar University (BRABU), Muzaffarpur. His father, Late Ramnath Singh, was respected locally.
Singh contested the 2025 Bihar Legislative Assembly election as the NDA-backed candidate of the Lok Janshakti Party (Ram Vilas). He won the Mahua seat, defeating his opponents in a multi-cornered contest.
Before his victory, the seat was held by Mukesh Kumar Raushan. Singh received strong campaign support from Chirag Paswan and several NDA leaders.
The Election Commission of India confirmed his win with official vote data.
Sanjay Kumar Singh is married to Alka Singh. The couple has two daughters and one son. Apart from politics, he is a businessman based in Mahua.