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 the 4 × 400 metres relay at the 1991 World Championships, together with teammates Patrick O'Connor, Devon Morris and Winthrop Graham.

Fagan competed for the Auburn Tigers track and field team in the NCAA.

Achievements Representing 1990Goodwill GamesSeattle, United States2nd4 × 400 m relay3:00.451991Central American and Caribbean ChampionshipsXalapa, Mexico1st400 m46.113rd4 × 400 m relay3:08.14Pan American GamesHavana, Cuba3rd4 × 400 m relay3:02.12World ChampionshipsTokyo, Japan3rd4 × 400 m relay3:00.10

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