Georgetown is a community located within the municipality of Three Rivers in Kings County, Prince Edward Island, Canada. It is the Capital of Kings County. Previously incorporated as a town, it was amalgamated with the town of Montague, the rural municipalities of Brudenell, Cardigan, Lorne Valley, Lower Montague, and Valleyfield, and portions of three adjac…Georgetown is a community located within the municipality of Three Rivers in Kings County, Prince Edward Island, Canada. It is the Capital of Kings County. Previously incorporated as a town, it was amalgamated with the town of Montague, the rural municipalities of Brudenell, Cardigan, Lorne Valley, Lower Montague, and Valleyfield, and portions of three adjacent unincorporated areas in 2018 to create the town of Three Rivers.