At its beginning, the County existed only for purposes of military enlistment. In 1823, it became a separate constituency for elections to the Legislative Assembly of Upper Canada, but, as eligibility to vote was dependent upon having title to property, and Simcoe's first registrar of deeds was not appointed until 1826, it did not send a separate member to the Assembly until the election of John Cawthra in 1828. It was withdrawn from the Home District in 1837, with its territory divided as follows: