Picton is an unincorporated community located in Prince Edward County in South Eastern Ontario, Canada, roughly 160 km east of Toronto. It is the County's largest community and former seat. Picton is located at the south-western 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. He also saw action at the Battle of Waterloo, where he was killed. It was formerly incorporated as a town.