Olympique Thonon Chablais, known as Club Sportif de Thonon until 1987, was a football club based in Thonon-les-Bains, France.

Founded in 1909, the club's colours were yellow and blue.

The team played its home matches at the Stade Joseph-Moynat.

From 1979 to 1987, Thonon played in the Division 2.

This article about a French association football club is a stub.