Guyana at the 1968 Summer Olympics

Athletics

Marathon, Men Harry Prowell 50

Boxing

Bantamweight, Men Dhanraj Singh =17
Middleweight, Men Charles Amos =9

Cycling Track

Sprint, Men Aubrey Bryce 3 h2 r2/10
1,000 metres Time Trial, Men Aubrey Bryce 31

Weightlifting

Light-Heavyweight, Men Rudolph James 19