William Vitved Kvist (né Kvist Jørgensen; born 24 February 1985) is a Danish former professional footballer who played as a midfielder for Danish club Copenhagen as well as for the Denmark national team.

He played 43 matches and scored four goals for various national youth teams, and was an important player to the senior team.

Born in Rønde in Jutland, Kvist started his football career at his local club Thorsager Rønde IF at the age of five. Two years later he moved to Copenhagen where he started with KB; one of the two clubs behind F.C. Copenhagen. While at KB, he made his debut for the Danish youth national teams (in November 2000), and played four matches at the 2002 UEFA European Under-17 Football Championship.

As a child, Kvist also played handball; as a footballer he is renowned for his very long throw-ins. In the 1996–97 season, he won the Danish youth championship in both sports: in handball with FIF and in football with KB.

Kvist was promoted to F.C. Copenhagen's first team in 2004. He debuted on 23 April 2005 in a match against FC Nordsjælland where he replaced an injured Ole Tobiasen in the right-back position. His first F.C. Copenhagen goal came on 22 October 2006 in a 3–0 win against Viborg FF, where he scored the last goal from long range.

Against Ajax in the UEFA Champions League third qualification round 2006 Kvist played a pass that deflected off Ajax defender Thomas Vermaelen for an own goal. This goal eventually sent F.C. Copenhagen through to the Champions League Group Stage.

In the season 2005–06, Kvist was often used as a substitute, particularly on the left wing – a position he didn't enjoy playing. He has also played in defence and other midfield positions.

Kvist was called up for the national team by manager Morten Olsen for a friendly tour of the United States, El Salvador and Honduras in January 2007. He was in the starting lineup for all three games of the tour, including a 3–1 loss to the United States national team on 20 January 2007.