Henry Thomas (born July 10, 1967) is a former American sprinter known for running at the high school and collegiate levels. A versatile athlete, he was successful at 100 metres through 400 metres, holding the World Youth best for 100 metres (for over 10 years), set in a race 7 days after he set the world Youth best in the 400 metres. He is the only athlete to simultaneously appear in both the 100m and 400m top lists. In 2010, Marsh, Thomas, Michael Graham and Sean Kelly joined together to celebrate the 25th anniversary of the record.