The Chevalier de Beauregard (c.1665- c.1692) was a 17th-century French officer who was active in Siam (modern Thailand). He became Governor of Bangkok and Mergui, but was eventually captured by the Siamese during the 1688 Siamese revolution. De Beauregard went to Siam in 1685, with the embassy of Chevalier de Chaumont. He was transferred to the garrison of Bangkok, under the command of Chevalier Claude de Forbin. In 1687 de Beauregard briefly replaced Forbin as Governor of Bangkok