Gediminas Kirkilas ( pronunciation (help·info), b. August 30, 1951, Vilnius, Lithuanian SSR, Soviet Union) is a former Prime Minister of Lithuania (2006-2008). He was appointed on July 4, 2006 after Zigmantas Balčytis, the provisional Prime Minister, failed to gather the required support from the Seimas. Kirkilas managed to get the necessary support from the Seimas on July 4, 2006 (). He stepped down on November 27, 2008 after the 2008 parliamentary elections, and gave way to Andrius Kubilius to start his term as prime minister.

After he returned from mandatory military service, from 1972 to 1978 he worked in many cultural monuments (eg. churches or the Verkiai Palace) restoring their interior and especially rolled gold and moldeling. In 1978–1982 he was a student of Political science. After graduation he joined the Communist Party of Lithuania and took various posts there. After Algirdas Brazauskas became the secretary of the party, Kirkilas became his press secretary.

Since the independence was declared on March 11, 1990, Kirkilas was involved in the state matters and was elected five times (in 1992, 1996, 2000, 2004 and 2008) to the Seimas under the Social Democratic Party of Lithuania ballot. He became defense minister of Lithuania on December 7, 2004.