Seymour Fagan (born 30 December 1967 in Old Harbour Bay) is a retired male track and field sprinter from Jamaica who specializes in the 400 metres. He won a bronze medal in 4 x 400 metres relay at the 1991 World Championships, together with teammates Patrick O'Connor, Devon Morris and Winthrop Graham.
| Year | Competition | Venue | Position | Event | Notes |
|---|---|---|---|---|---|
| Representing Jamaica | |||||
| 1990 | Goodwill Games | Seattle, United States | 2nd | 4x400 m relay | |
| 1991 | Pan American Games | Havana, Cuba | 3rd | 4x400 m relay | |
| Central American and Caribbean Championships | Xalapa, Mexico | 1st | 400 m | ||
| World Championships | Tokyo, Japan | 3rd | 4x400 m relay | ||