Wellington is an unincorporated place and community in Prince Edward County in eastern Ontario, Canada. It has a population of 1,932 according to the 2016 Census. The community is located on the shore of both Lake Ontario and West Lake in the southwest of the county. Sandbanks Beach, the northernmost of Sandbanks Provincial Park's beaches, is locateā¦Wellington is an unincorporated place and community in Prince Edward County in eastern Ontario, Canada. It has a population of 1,932 according to the 2016 Census. The community is located on the shore of both Lake Ontario and West Lake in the southwest of the county. Sandbanks Beach, the northernmost of Sandbanks Provincial Park's beaches, is located in the Village of Wellington, where it is called Wellington Rotary Beach.