The prime minister of Lithuania is the head of the government of Lithuania. The prime minister is Lithuania's head of government and is appointed by the president with the assent of the Lithuanian parliament, the Seimas. The modern office of prime minister was established in 1990, when Lithuania declared its independence, although the official title was "Chairperson of the Council of Ministers" until 25 November 1992.

The Government of Lithuania, officially the Government of the Republic of Lithuania, is the cabinet of Lithuania, exercising executive power in the country. Among other responsibilities, it executes laws and resolutions of the parliament, the Seimas, and the decrees of the President, manages state property and, together with the president, executes the foreign policy of the country. The Government also has the right of legislative initiative, puts together the state budget and presents it to the Seimas for approval.