2005 Kentucky Derby
| Kentucky Derby | |
| Location | Churchill Downs |
|---|---|
| Date | May 7, 2005 |
| Winning horse | Giacomo |
| Winning time | 2:02.75 |
| Starting price | 50-1 |
| Jockey | Mike Smith |
| Trainer | John Shirreffs |
| Owner | Jerry & Ann Moss |
| Conditions | Fast |
| Surface | Dirt |
| Attendance | 156,435 |
The 2005 Kentucky Derby was the 131st running of the Kentucky Derby. The race took place on May 7, 2005, and was won by Giacomo, a longshot at odds of 50–1. Another longshot, Closing Argument, finished second, resulting in an exacta payout of $9,814.80. A crowd of 156,435 was in attendance.