Geir Hilmar Haarde (pronounced ) (born 8 April 1951) was Prime Minister of Iceland from 15 June 2006 to 1 February 2009 and Chairman of the Icelandic Independence Party from 2005 to 2009. Geir initially led a coalition between his party and the Progressive Party. After the 2007 parliamentary election, in which the Independence Party increased its share of the vote, Geir renewed his term as Prime Minister, leading a coalition between his party and the Alliance. That coalition resigned in January 2009 after widespread protests following an economic collapse in October 2008.

Geir was born in the Icelandic capital Reykjavík to Tomas Haarde, a Norwegian from Rogaland, and an Icelandic mother. He received his bachelor's degree in the United States at Brandeis University as a Wien Scholar, graduating with a degree in Economics, then went on to earn two Master's degrees – in International Relations from the School of Advanced International Studies of The Johns Hopkins University and in economics from the University of Minnesota.

Prior to entering the Althing (the Icelandic Parliament), Geir was an economist at the Central Bank of Iceland from 1977 to 1983 and was a political adviser to the Icelandic Minister of Finance from 1983 to 1987. He was a member of the Althing for 22 years, 1987-2009. Geir was Chairman of the Independence Party Parliamentary Group from 1991 to 1998 and a member of the Alþing's Foreign Affairs Committee from 1991 to 1998; he was Chairman of the Foreign Affairs Committee from 1995 to 1998. He served as Minister of Finance from April 1998 to September 2005 and then as Minister for Foreign Affairs from September 2005 to June 2006. He was elected Chairman of the Independence Party in an uncontested election in October 2005, following the departure of Davíð Oddsson.