Harry "Doc" J. Huff (1881 – April 1964) was an American athlete. He competed at the 1908 Summer Olympics in London.
He died in Kansas City, Missouri.
In the 100 metres, Huff won his first round heat with a time of 11.4 seconds, one of the slower winning times. He dropped his time to 11.1 seconds in his semifinal race to finish second behind eventual silver medallist James Rector who tied the Olympic record at 10.8 seconds.
Huff also won his preliminary heat in the 200 metres with a time 22.8 seconds. He came in last in his three-man semifinal race, running the distance in 23.0 seconds.