Robert Henry Grant was a politician in Ontario, Canada. He was a United Farmer member of the Legislative Assembly of Ontario from 1919 to 1923. He represented the riding of Carleton. He served as a cabinet minister in the government of E.C. Drury. Robert Grant Avenue in the Fernbank neighborhood of Stittsville is named after Grant and his father. The nearby Grant Crossing shopping area is also named after the family farm which once stood on the land.