Robert Philson (c. 1759 – July 25, 1831) was an Irish-American soldier and politician.
Philson was born in County Donegal, Ulster, Ireland, and immigrated to Pennsylvania with his uncle John Fletcher. They kept a store in Berlin, Bedford County, Pennsylvania.
In 1794, Philson was arrested for his involvement in the Whiskey Rebellion. He was sent to Philadelphia for trial, but he and his co-defendant, Herman Husband, were acquitted.
Philson served as associate judge of Somerset County, Pennsylvania, for twenty years, and also served as a one-term congressman during the 16th United States Congress.
Philson was commissioned a brigadier general of the Second Brigade, Tenth Division, Pennsylvania militia on May 9, 1800. During the War of 1812, he served as a brigadier general of the Second Brigade, Twelfth Division, Pennsylvania Volunteers.