Peter van der Vlag (born 5 December 1977) is a Dutch former professional footballer who played as a goalkeeper. Later he was the goalkeeper coach of SC Cambuur.
Van der Vlag was born in Leeuwarden. He was part of the youth setup at amateur team, v.v. Wildervank, before turning professional with BV Veendam in the Eerste Divisie in 1997. He played 145 games for Veendam before moving to Go Ahead Eagles in 2003. After playing for Cambuur Leeuwarden between 2004 and 2009, Van der Vlag returned to his first professional club, Veendam, in 2009.
In July 2011 he re-joined his Veendam head coach Joop Gall by returning at his old club Go Ahead Eagles.
In the summer of 2012, Van der Vlag signed for FC Emmen. He left after two seasons to become second-choice goalkeeper of Eredivisie side FC Groningen.
Van der Vlag retired at the end of the 2018–19 season and was then hired as a goalkeeper coach for his former club SC Cambuur until June 2025.
Peter van der Vlag at WorldFootball.net
Peter van der Vlag at Voetbal International Archived 26 October 2014 at the Wayback Machine (in Dutch)
Peter van der Vlag at Soccerway