The ninetieth Cabinet of Bulgaria was a minority government chaired by Boyko Borisov. The government was formed after Borisov's party, GERB, won the 2009 parliamentary election. It remained in power relying on support from the opposition parties for almost four years before resigning following nationwide protests.

Parliamentary elections were held in Bulgaria on 5 July 2009. With 40% of the vote, the decisive winner of the elections was the established in 2006 personalistic party of Boyko Borisov, GERB. The Socialist Party, in power before the election, was in second place, with around 18%. Оnce-ruling National Movement Simeon II did not cross the 4% threshold and won no seats. The turnout was 60.6%, one of the lowest ever. Following the election, GERB leader Boyko Borisov became Prime Minister. Just like all the previous parliamentary elections since the fall of communism, the government was not re-elected.