Junior Cornette (born 15 April 1966) is a retired Guyanese sprinter.
He won the bronze medal in the 200 metres at the 1990 Central American and Caribbean Games. He also competed at the 1991 and 1993 World Championships without reaching the final.
| Year | Competition | Venue | Position | Event | Notes |
|---|---|---|---|---|---|
Representing  Guyana | |||||
| 1990 | Central American and Caribbean Games | Mexico City, Mexico | 4th | 100 m | 10.48 (w) |
| 3rd | 200 m | 21.22 | |||
| 1991 | Pan American Games | Havana, Cuba | 14th (h) | 100 m | 10.88 |
| 24th (h) | 200 m | 30.24 | |||
| World Championships | Tokyo, Japan | 45th (h) | 100 m | 10.63 | |
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