He was born in a Brahmin family hailing from Raigad district. His forthfathers migrated from Beed district to Goregaon village of Raigad district. He got help from his other middle class relatives while studying.
He was married on 14 May 1964 to Smt.
Anagha Joshi, and has a son, Unmesh, and two daughters. Shri Manohar Joshi has been awarded a doctorate (in political science) by Mumbai University in 2010.