Hangthong Thammawattana (Thai: ห้างทอง ธรรมวัฒนะ, also spelled Tumwattana, 20 November 1949 – 6 September 1999) was a Thai businessman and politician. He was the second eldest son of the , which had been involved in a long-running inheritance dispute; Hangthong became head of the family following his mother's death in 1990 and eldest brother's forced disappearance in 1991. He entered politics and was elected to the House of Representatives in 1995, representing Bangkok for the Thai Citizens' Party.