 As a 16-year-old, Chapman was called into the England U–18 team, and captained her country at that level.Chapman made her senior debut for England at 17, during the 2001 UEFA Women's Championship qualification tournament, replacing Samantha Britton after 73 minutes of a 1–0 win over Switzerland in Bristol on 6 May 2000.Chapman's first senior start came in an 8–0 reverse to Norway in June 2000.