Harry Prowell A.A. (10 July 1936 – 27 June 2000) was a Guyanese long distance runner who represented Guyana in the Marathon at the 1968 Summer Olympics in Mexico City, Mexico. He is known to be one of the greatest long distance runners Guyana and the Caribbean has ever produced, setting the national record in 1968. To date, he is the only Guyanese ever to compete in the Marathon at the Summer Olympic Games and one of the most prominent Indo-Caribbean long distance runners of his time. At the British West Indies Championships he won the Gold Medal in the Men's 5000m in 1965 and 1960 as well as the Gold in the 10,000m in 1960. He was a Silver Medalist in the Half-Marathon at the 1965 games and won Silver at both the 1959 and 1958 games in the Men's 5,000m and 10,000m events.