Duncan Huisman (born 11 November 1971 in Doornspijk, Gelderland) is a Dutch racing driver. He won the Guia Race four times and the 24 Hours of Nürburgring in 2005. He claimed three titles at the Dutch Touring Car Championship in 1997, 2000 and 2002, and resulted runner-up at the 2010 and 2011 Dutch GT4 Championship. He has also competed in the FIA GT Championship and the Porsche Supercup. His older brother Patrick is also a successful racing driver.
He is three times Dutch Touring Car Champion, having won the title in 1997, 2000 and 2001 in a BMW 3-Series.
Between 2001 and 2004 he drove in the European Touring Car Championship, before it was renamed the World Touring Car Championship.In 2005 he first drove in the WTCC for the final two rounds with BMW Team UK, winning in what was only his second race. He competed for just over half a season in 2006 for BMW Team Italy/Spain finishing the season thirteenth overall. Duncan drove for the WSR-managed Team Aviva in the WTCC event in Macau at the end of 2007 prompting speculation that he will join Team RAC in the 2008 British Touring Car Championship (BTCC) alongside Colin Turkington following the departure of Tom Onslow-Cole to Vauxhall's VXR Racing.Stephen Jelley was Onslow-Coles replacement, and Huisman returned again for just two 2008 WTCC rounds at Oschersleben for Wiechers-Sport in a BMW 320si.