| 47th Kentucky Derby | |
| Class: | Grade I stakes race |
| Horse Race: | Kentucky Derby |
| Location: | Churchill Downs |
| Date: | May 7, 1921 |
| Winning Horse: | Behave Yourself |
| Winning Jockey: | Charles Thompson |
| Winning Trainer: | Herbert J. Thompson |
| Winning Owner: | Edward R. Bradley |
| Surface: | Dirt |
| Previous: | 1920 |
| Next: | 1922 |
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.
| Finished | Post | Horse | Jockey | Trainer | Owner | Time / behind | ||
|---|---|---|---|---|---|---|---|---|
| 1st | 1 | Behave Yourself | Charles Thompson | Herbert J. Thompson | Edward R. Bradley | 2:04.20 | ||
| 2nd | 7 | Black Servant | Lawrence Lyke | Herbert J. Thompson | Edward R. Bradley | Head | ||
| 3rd | 2 | Prudery | Clarence Kummer | James G. Rowe Sr. | Harry Payne Whitney | 6 | ||
| 4th | 10 | Tryster | Frank Coltiletti | James G. Rowe Sr. | Harry Payne Whitney | |||
| 5th | 3 | Careful | Frank Keogh | Eugene Wayland | Walter J. Salmon Sr. | 4 | ||
| 6th | 5 | Coyne | Mack Garner | Charles C. Van Meter | Harned Bros. | 4 | ||
| 7th | 4 | Leonardo II | Andy Schuttinger | Kimball Patterson | Xalapa Farm Stable | 1 | ||
| 8th | 12 | Uncle Velo | Earl Pool | Will Perkins | George F. Baker | |||
| 9th | 11 | Bon Homme | Clifford Robinson | Kimball Patterson | Xalapa Farm Stable | 2 | ||
| 10th | 6 | Planet | Henry King | Will Buford | Hal Price Headley | 6 | ||
| 11th | 8 | Star Voter | Lavelle Ensor | Henry McDaniel | J. K. L. Ross | 5 | ||
| 12th | 9 | Muskallonge | George W. Carroll | Albert B. "Alex" Gordon | H. C. "Bud" Fisher | 1 |
| Post | Horse | Win | Place | Show | |
|---|---|---|---|---|---|
| 1 | Behave Yourself | $ 19.30 | 13.00 | 5.60 | |
| 7 | Black Servant | 13.00 | 5.60 | ||
| 2 | Prudery | 3.30 |