The 1918–19 season was Chelsea Football Club's thirteenth year in existence.

Due to the ongoing First World War, the Football League and the FA Cup were suspended so the club instead participated in the London Combination, an unofficial regional league mainly comprising teams from London.

Chelsea finished 6th in the league, but did win the London Victory Cup.

[1] Former Chelsea player Philip Smith was killed in action whilst fighting in the Western Front on 29 September 1918.

[5][6] This article about an English association football club season is a stub.