The 2004–05 Combined Counties Football League season was the 27th in the history of the Combined Counties Football League, a football competition in England.
The Premier Division featured two new teams in a league of 24 teams after the promotion of AFC Wimbledon to the Isthmian League.
Division One featured two new teams in a league of 18 teams: Also, Chobham & Ottershaw changed their name to Chobham.