Johannes Marijnus Antonius Maria "Jan" de Wit (born 10 May 1945) is a former Dutch politician and lawyer. As a member of the Socialist Party (Socialistische Partij) he was an MP from 19 May 1998 to 1 April 2014. He focused on matters of judiciary and aliens policy. From 1995 to 1998, he was a Senator.
In 1972, he joined the Socialist Party, which had just been founded in 1971. From 1972 to 1996, he was a local party executive, and from 1988 to 1992, he was also a party executive on the national level. Furthermore, he was an SP councillor of Heerlen from 1982 to 1995 and chairman of SP's think tank foundation until 1997.
In 1995, de Wit was elected into the Dutch Senate; he was the sole representative of the SP until 1998. In 1998, he exchanged the Senate for the Dutch House of Representatives.
de Wit is married to Riet de Wit [nl], who is an SP alderwoman in Heerlen. They have three children. Raised as a Catholic, he turned non-religious later on.
Underline signifies the parliamentary leader (first mentioned) and the Speaker Angle brackets signify a replacement member or a member who prematurely left this House of Representatives