Jan Poortvliet (Dutch pronunciation: [ˈjɑn ˈpɔːrt.flit]; born 21 September 1955) is a Dutch former professional footballer who played as a left-back. He represented the Netherlands national team at the 1978 FIFA World Cup in Argentina. His biggest club successes came when he played for PSV Eindhoven in the mid- and late 1970s. After his retirement in the early 1990s he became a football manager, who worked for clubs like FC Den Bosch, RBC Roosendaal and Stormvogels Telstar.