Billingham Synthonia F.C. is a football club based in Billingham, England. They were established in 1923, playing first in the Teesside League, and joining the Northern League in 1945. In the 1993–94 season, they reached the quarter-finals of the FA Trophy, in a run which included victories over Conference sides Kettering Town and Macclesfield Town. They are currently members of the Northern League Division One.