| Kentucky Derby | |
| Grade I stakes race | |
.jpg) Behave Yourself after winning the 1921 Kentucky Derby | |
| Location | Churchill Downs |
|---|---|
| Date | May 7, 1921 |
| Winning horse | Behave Yourself |
| Jockey | Charles Thompson |
| Trainer | Herbert J. Thompson |
| Owner | Edward R. Bradley |
| Surface | Dirt |
The 1921 Kentucky Derby was the 47th running of the Kentucky Derby. The race took place on May 7, 1921.[1] Behave Yourself was the upset winner of the 1921 Kentucky Derby over his stablemate, Black Servant.