Sampat Singh was born in the village of Bhattu Kalan, Fatehabad District, Haryana, on 20 April 1949. His father was Ram Chander.Educated in the village and at Hisar, he holds MA and B.Ed. degrees. He is married to Krishna Singh and has two children. Singh was a lecturer in political science at Dayanand College, Hisar for five years from 1972. He has been jailed several times, including in 1972-73 and 1983, while campaigning for various causes.
Career
State politics
Singh has been elected to the Haryana Legislative Assembly in 1982, 1987, 1991, 1998, 2000 and 2009. Singh was appointed at political secretary to Devi Lal in 1977 and held the post for two years. At this point, Devi Lal headed the Janata Party. Singh stood unsuccessfully in the Bhattu Kalan constituency by-election of 1980, claiming afterwards that he lost "because of widespread use of unfair means". He won the seat in the 1982 state assembly elections. Between 1991-1996, Singh was Leader of the Opposition in the state assembly. Heeding views of his close supporters, Singh quit the Indian National Lok Dal on 14 July 2009 and held a meeting with his supporters and workers on 18 July 2009 in Hisar. He described the INLD as being in "complete disarray", no longer aligned with the principles of Devi Lal and subject to the nepotism of its then leader, Om Prakash Chautala. After ending his 32-year association with it, he joined the Indian National Congress on 27 July 2009. The INC selected Singh as their candidate for the Nalwa constituency in Hisar. He then won the seat in the 2009 elections by defeating the sitting member, Jasma Devi of the HJC.
1980: election conveyor for Devi Lal during 7th Lok Sabha elections
1980: contested by-election from Bhattu Kalan
1981: State Youth Party President until 1984, when he resigned at the age of 35 to make way for other youth members
1982: elected to 6th Vidhan Sabha from Bhattu Kalan constituency. Member of the Scheduled Caste and Welfare Society of Haryana Vidhan Sabha
1984: District Party President, Hisar until 1987
1987: elected to 7th Vidhan Sabha, Bhattu Kalan constituency, Minister of Industry, Excise & Taxation, Town & Country Planning, Home, Local Bodies, Jails, Public Relations, Irrigation & Power, Finance, Parliamentary Affairs & Planning
1991: elected to 8th Vidhan Sabha, Bhattu Kalan constituency, Leader of Opposition, Haryana
1996: contested election from Bhattu Kalan
1998: elected to 9th Vidhan Sabha, Fatehabad constituency, Chairman, Assurance Committee, Haryana Vidhan Sabha