[1][2][3] Sadanand Singh was born in a Kurmi family of Bihar.

He was a president of Bihar Provincial Congress Committee for two terms.

His son Shubhanand Mukesh contested in 2020 Bihar Legislative Assembly election from Kahalgaon Assembly constituency, but lost to Bharatiya Janata Party candidate, Pawan Kumar Yadav.

Singh was revered by the leaders of Bihar, cutting across their party line.

He led establishment of a power grid at Kahalgaon and a power sub station at Sanhaul in his constituency, which provided uninterrupted supply of electricity to the people of this area.