Jan Heemskerk, Dutch lawyer and politician, Prime Minister of the Netherlands (born 1818)

Jan Heemskerk Abrahamszoon was a Dutch politician who served as Chairman of the Council of Ministers from 1874 to 1877, and again from 1883 to 1888. His son, Theo Heemskerk also served as Chairman of the Council of Ministers.

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.