Deseronto is a town in the Canadian province of Ontario, in Hastings County, located at the mouth of the Napanee River on the shore of the Bay of Quinte, on the northern side of Lake Ontario. The town was named for Captain John Deseronto, a native Mohawk leader who was a captain in the British Military Forces during the American Revolutionary War. More extensive development began with sale of village tracts by Deseronto's grandson John Culbertson in 1837.