James Guyon Jr. (24 December 1778-9 March 1846) was a member of the US House of Representatives (DR-NY 1) from 14 January 1820 to 3 March 1821, succeeding George Townsend and preceding Cadwallader D. Colden. Born in Staten Island, he served in the State Assembly from 1812 to 1814 and in Congress from 1820 to 1821, after which he engaged in farming.