Harold Sly (26 February 1904 – 1996) was an English professional footballer of the 1920s and 1930s.
Born in Appley Bridge, he played football for the Rover Company's team before joining Birmingham, however he never started a match for the club in the English Football League, and dropped back into the amateur game with Tamworth Castle.
[1] In 1927 he joined Gillingham of the Football League Third Division South, where he spent two seasons but never secured a regular place in the club's first team.
[2] He then moved to Brighton & Hove Albion, before joining French club FC Sète.
This biographical article related to association football in England, about a defender born in the 1900s, is a stub.