In 1924 the federal electoral district of Grenville was abolished when the county's riding was amalgamated with that of Dundas to become a new district known as Grenville-Dundas. In 1925 a federal election was held to determine who would be the first representative for the new electoral district in the House of Commons.
In 1924, the federal electoral district of Grenville was dissolved when it merged with Dundas's constituency into a new district called Grenville-Dundas. In 1925, an election was held to determine who would be the first representative for this newly created electoral district in the House of Commons.