| Club: | Chelsea |
| Season: | 1972–73 |
| Manager: | Dave Sexton |
| Chairman: | Brian Mears |
| Stadium: | Stamford Bridge |
| League: | First Division |
| League Result: | 12th |
| Cup1: | FA Cup |
| Cup1 Result: | Quarter-finals |
| Cup2: | League Cup |
| Cup2 Result: | Semi-finals |
| League Topscorer: | Peter Osgood and Chris Garland (11) |
| Season Topscorer: | Peter Osgood (17) |
| Largest Win: | 4–0 v Leeds United |
| Largest Loss: | 0–3 v Ipswich Town |
| Highest Attendance: | |
| Lowest Attendance: | |
| Pattern Sh1: | _thinwhitesides |
| Leftarm1: | 0000DD |
| Body1: | 0000DD |
| Rightarm1: | 0000DD |
| Shorts1: | 0000DD |
| Socks1: | 0000DD |
| Pattern B2: | _chelsea1972a |
| Leftarm2: | FF0000 |
| Rightarm2: | FF0000 |
| Socks2: | 008000 |
| Prevseason: | 1971–72 |
| Nextseason: | 1973–74 |
The 1972–73 season was Chelsea Football Club's fifty-ninth competitive season.