Katie Sarah Chapman (born 15 June 1982) is an English footballer who plays for English club Arsenal Ladies in the FA WSL and is a former member of the England women's national team. She primarily plays as a central midfielder, although she has also been deployed in central defence while playing for England. Chapman is known for her strength, fierce tackling and heading ability. A mother of three, Chapman is described as "a physical player who handles a brunt of the dirty work in the middle of the pitch. She also can produce on the offensive end in a big game." Her playing ability, profile and influence have drawn comparisons to former England captain and fellow Londoner David Beckham.

Chapman is a former England U–18 captain. She made her senior international debut aged 17 in May 2000 in a 2001 UEFA Women's Championship qualification match against Switzerland. The following month, she made her first start against Norway. In March 2002 she netted her first senior international goal in a 4–1 2003 FIFA Women's World Cup qualification win in the Netherlands. Chapman has represented England at four major international tournaments; UEFA Euro 2001, UEFA Euro 2005, 2007 FIFA World Cup and UEFA Euro 2009. A two–time winner of the FA International Player of the Year in 2002 and 2010, Chapman took a break from the national team in March 2011 with a total of 82 caps and eight goals. She remains available for England selection.