Katie Sarah Chapman (born 15 June 1982) is an English former professional footballer. She primarily played as a central midfielder, although she was also deployed in central defence while playing for the England women's national team. Chapman was described as "a physical player who handles a brunt of the dirty work in the middle of the pitch." Her playing ability, profile and influence have drawn comparisons to former England captain David Beckham.
Chapman began her football career playing at primary school in her hometown of Bermondsey. At ten years old, she joined leading women's club Millwall Lionesses. In the 1996–97 season, Chapman made her senior team debut at the age of 14. She became a regular starter in the team and also participated in the 1997 FA Women's Premier League Cup and FA Women's Cup final wins. In the 1998–99 season, Chapman won FA Young Player of the Year award.
Already a full England international, she left Millwall in 2000 to sign a professional contract with Fulham. She played on the teams that won back-to-back promotions, as well as the 2001–02 Premier League Cup and 2002 FA Women's Cup. In June 2001, Chapman was again named FA Young Player of the Year. After two years with Charlton Athletic from 2004, Chapman joined Arsenal and reached prominence with the team in her first season, winning a domestic treble as well as the UEFA Women's Cup.