| Club: | Chelsea |
| Season: | 1918–19 |
| Manager: | David Calderhead |
| Chairman: | Claude Kirby |
| Stadium: | Stamford Bridge |
| League: | London Combination |
| League Result: | 6th |
| Cup1: | London Victory Cup |
| Cup1 Result: | Winners |
| Season Topscorer: | Joe Smith (21) |
| Largest Win: | 6–0 v Clapton Orient |
| Largest Loss: | 2–6 v Fulham |
| Pattern B1: | _chelsea1907h |
| Pattern So1: | _2bluestripes |
| Leftarm1: | 0000FF |
| Body1: | FFFFFF |
| Rightarm1: | 0000FF |
| Shorts1: | ffffFF |
| Socks1: | 000000 |
| Pattern B2: | _chelsea1905a |
| Pattern So2: | _2_stripes_white |
| Leftarm2: | FFFFFF |
| Body2: | FFFFFF |
| Rightarm2: | FFFFFF |
| Shorts2: | FFFFFF |
| Socks2: | 0000ff |
| Prevseason: | 1917–18 |
| Nextseason: | 1919–20 |
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. Results and statistics from these matches are not considered official. 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.[2] George Lake died of wounds on 6 November 1918, five days before the armistice, two days after his battalion's attempt to cross the Sambre–Oise Canal near Frasnoy, France.[3] He was buried in Frasnoy Communal Cemetery.[4] Lake was one of the two last English footballers to die in the war, dying on the same day as Edward Thompson.[5] [6]