Hari Kostov (born November 13, 1959) was the prime minister of Macedonia from May 2004 to November 2004. He was appointed to the position of Prime Minister by the parliament on May 31, 2004, two weeks after being nominated by President Branko Crvenkovski. Kostov was an economic advisor to the Macedonian government and the World Bank during the 1980s and 1990s. He was the interior minister in the previous government, which was led by Crvenkovski and lasted from 2002 until 2004, and ended when Crvenkovski was elected president. Kostov retained most officials from the Crvenkovski government.

Kostov announced his resignation on November 15, 2004, following disputes within the coalition government, particularly between ethnic Macedonian and ethnic Albanian ministers. He left office on November 18, 2004, when his resignation was accepted, and was succeeded by his deputy, Radmila Sekerinska.