Peter van Heemst, Dutch politician
Erik Peter van Heemst (born 10 July 1952 in Rotterdam) is a Dutch politician. From 1991 to 2006 he was a member of the House of Representatives for the Dutch Labour Party (PvdA). Since the municipal elections of 2006 he was the leader of the PvdA in Rotterdam, until his resignation on 27 March 2014.

Van Heemst studied law in Rotterdam, after which he became personal assistant to Hans Kombrink, member of parliament for the PvdA at that time. He was also a public housing staff member for the PvdA. From 1978 to 1991 he was a member of the provincial parliament of South Holland for the PvdA, and in 1987 he became a member of the provincial executive for urban renewal, recreation, nature and landscaping. In 1991 he became an MP for the PvdA.

When he left his post in 2006 to become leader of the PvdA in Rotterdam he was the longest-sitting member of the PvdA in the House of Representatives.