Picton is an unincorporated community located in Prince Edward County in southeastern Ontario, roughly 160 km east of Toronto. It is the county's largest community and former seat located at the southwestern end of Picton Bay, a branch of the Bay of Quinte, which is along the northern shoreline of Lake Ontario. The town is named for Lieutenant General Sir Thomas Picton, who served in the British Army during the Peninsular War in Spain and Portugal.