1940 Kentucky Derby
| Kentucky Derby | |
| Grade I stakes race | |
| Location | Churchill Downs |
|---|---|
| Date | May 4, 1940 |
| Winning horse | Gallahadion |
| Jockey | Carroll Bierman |
| Trainer | Roy Waldron |
| Owner | Milky Way Farm Stable |
| Surface | Dirt |
The 1940 Kentucky Derby was the 66th running of the Kentucky Derby. The race took place on May 4, 1940.