Pierre Maria Michel Heijnen (born October 5, 1953 in The Hague) is a Dutch politician and former civil servant. As a member of the Labour Party (Partij van de Arbeid) he has been an MP since March 1, 2007. He focuses on matters of local government, civil service personnel and finances.
Heijnen studied Dutch language and Dutch literature at Utrecht University. He worked at the Province of South Holland from 1977 to 1998. From 1986 to 2002 he was a member of the municipal council of The Hague and from April 1998 to April 2006 an alderman of the same municipality.