William Keasberry (1726 – 15 November 1797), sometimes spelt Keasbury, was an English actor and theatre manager of the 18th century whose career was chiefly in Bath, Somerset. The son of another William Keasberry, by his marriage to Catherine Liddell, he was born in London. In 1760, Keasberry and Richard Griffith established a temporary theatre at Winchester "in consequence of a Camp consisting of eight regiments". He was buried at St Thomas à Becket's church, Widcombe, Bath.