Jan Terlouw

Jan Cornelis Terlouw (15 November 1931 – 16 May 2025) was a Dutch politician, physicist and author. A member of the Democrats 66 (D66) party, he served as Deputy Prime Minister of the Netherlands from 1981 to 1982 under Prime Minister Dries van Agt.

Terlouw studied physics at the Utrecht University where he obtained his master's degree and then worked as a researcher at the FOM before finishing his thesis and obtaining his PhD in mathematics and physics. Terlouw worked as a nuclear physics researcher at the Massachusetts Institute of Technology (MIT) from February 1960 until April 1962, and for the Royal Institute of Technology (KTH) from August 1965 until December 1966. After the 1971 general election Terlouw was elected to the House of Representatives on 11 May 1971 and served as a frontbencher and spokesperson for economic affairs and science. After Party Leader and Parliamentary leader Hans van Mierlo announced he was stepping down, Terlouw was unanimously selected as his successor on 1 September 1973.

For the 1977 and 1981 general elections, Terlouw served as lead candidate, and following a cabinet formation with Christian democratic Leader Dries van Agt and Labour Leader Joop den Uyl formed the second Van Agt cabinet, with Terlouw appointed Deputy Prime Minister and Minister of Economic Affairs, taking office on 11 September 1981. The cabinet fell just seven months into its term and was replaced by the caretaker third Van Agt cabinet, with Terlouw continuing his offices. For the 1982 general election, Terlouw again served as lead candidate but shortly thereafter announced he was stepping down as Leader on 8 September 1982.