August Louis Baeyens (5 June 1895 in Antwerp – 17 July 1966 in Antwerp) was a Belgian violist and composer.
Baeyens studied viola, harmony and counterpoint with Napoleon Distelmans and August de Boeck at the Flemish Conservatory in Antwerp receiving a first prize in viola in 1916.
Beginning in 1911, he was a viola player in Belgian orchestras including that of the French-language opera company in Antwerp, de Royal, and in the orchestra of the Nieuwe Concerten.In 1927, Baeyens founded the Antwerps Kamermuziekensemble (Antwerp Chamber Ensemble).
The group performed a wide range of contemporary music before its demise in 1932.