Chautala served as the
Chief Minister of Haryana from 2 December 1989 to 22 May 1990, from 12 July 1990 to 17 July 1990, again from 22 March 1991 to 6 April 1991 and, finally, from 24 July 1999 to 5 March 2005. Om Prakash became the Chief Minister for the first time in 1989, but since he was not a member of the Legislative Assembly, he contested the by-elections three times. When the first election was postponed due to booth-hopping, the second election was cancelled when the independent candidate died. Finally, he won the third by-election held in his native Darba-Kalyan constituency in 1990. He became the Chief Minister for the first time on 2 December 1989, but was forced to resign on 22 May 1990 after being accused of the death of an independent candidate. Banarasi Das became the Chief Minister in his place. He was re-elected as the Chief Minister on 12 July 1990, but resigned on 16 July due to pressure from the party. Hukam Singh replaced Om Prakash as the Chief Minister. Eight months later, on 22 March 1991, Om Prakash again became the Chief Minister, but on 6 April of the same year, he resigned as the Chief Minister after the imposition of President's Rule in Haryana due to political instability. Eight years later, in 1999, he overthrew the Bansilal government, who was the Chief Minister, and took power again on 24 July 1999 with the support of the BJP. The following year, in the 2000 assembly elections, when the INLD won a majority, the Om Prakash Chautala government again took power on 2 March 2000. Om Prakash, who completed his five-year term until 2005, was the Chief Minister until the INLD was defeated in the 2005 assembly elections. Politically, he had been part of
NDA and Third Front (non-NDA & non-UPA front) at national level. Chautala was released from the
Tihar Jail on 2 July 2021 after serving nine and a half years of a 10-year prison sentence. His early release was due to a decision of the
Delhi government to reduce prison populations to manage the
COVID-19 pandemic. Chautala completed his matriculation and intermediate education in 2021 at the age of 87. == Controversies ==