Mart Siimann, Estonian psychologist and politician, 12th Prime Minister of Estonia

Mart Siimann is an Estonian politician. He was Prime Minister of Estonia from 1997 to 1999 as a member of the Estonian Coalition Party, and President of the Estonian Olympic Committee from 2001 to 2012.

The prime minister of Estonia is the head of government of the Republic of Estonia. The prime minister is nominated by the president after appropriate consultations with the parliamentary factions and confirmed by the parliament (Riigikogu). In case of disagreement, the parliament can reject the president's nomination and choose their own candidate. In practice, since the prime minister must maintain the confidence of parliament in order to remain in office, he or she is usually the leader of the senior partner in the governing coalition. The current prime minister is Kristen Michal of the Reform Party. He took the office on 23 July 2024 following the resignation of Kaja Kallas.