Johan Georg "Jan" Nagel (born 20 June 1939) is a Dutch politician who was a member of the Labour Party, and later formed his own parties. He is currently in the Pensioners' Party 50PLUS.

Nagel started his career in his twenties on VARA-Radio where he worked as a producer. At the same time he served as a member of the executive committee of the Dutch Labour Party. Nagel was one of the creators of the radio-program called In de Rooie Haan. He also wrote his Tien over Rood which served as a political manifesto of the Nieuw Links within the Dutch Labour Party. From 1977 to 1983 Nagel was a PvdA deputy in the Dutch House of Representatives. At VARA-Radio he eventually became the editor-in-chief of the Achter het Nieuws.

Preoccupied with the problem of the widening gap between politics and people, he founded in 1993 a local party called Leefbaar Hilversum. In 2001 he established Leefbaar Nederland where he worked with Henk Westbroek, Willem van Kooten, Ton Luiting, Broos Schnetz and Pim Fortuyn. He has also been the party chairman of Leefbaar Nederland.^[1] In 2005 there followed the Party for Justice, Action and Progress (in Dutch: Partij voor Rechtvaardigheid, Daadkracht en Vooruitgang (PRDV)) which he founded together with the former police spokesman Klaas Wilting, entrepreneur Peter Schouten and the party's first lijsttrekker reporter Peter R. de Vries. His autobiography Boven het maaiveld was published in 2001. Nagel participated in the Provincial States elections of 2 March 2011 as a founding member of 50PLUS. His son in law is chess grandmaster Yasser Seirawan.