Dirk Jan de Geer, Dutch lawyer and politician, Prime Minister of the Netherlands (born 1870)

Jonkheer Dirk Jan de Geer was a Dutch politician of the Christian Historical Union. He served as Prime Minister of the Netherlands from 8 March 1926 until 10 August 1929, and from 10 August 1939 until 3 September 1940.

The prime minister of the Netherlands or, before 1945, the chairman of the Council of Ministers is the de facto head of government of the Netherlands. Although the monarch is the de jure head of government, in practice the prime minister occupies this role as chair of the Council of Ministers, coordinating its policy with the rest of the cabinet. In his role as the de facto head of government, the prime minister also represents the Netherlands in the European Council. Forty-three incumbents have served in the position. The current prime minister since 2 July 2024 is Dick Schoof.