John Sowdon (died 1789) was an Irish stage actor of the eighteenth century. His origins are a matter of dispute with one source claiming he was the brother of the owner of Castle Otway while George Anne Bellamy claimed he was the son of a horse milliner. In 1767 he joined Samuel Foote's company at the Haymarket Theatre where he remained for three years. His final known appearance was at the Theatre Royal, Edinburgh in 1771