Lancaster is an unincorporated community in South Glengarry, Ontario, Canada, located near the St. Lawrence River. It is recognized as a designated place by Statistics Canada.
Demographics
In the 2021 Census of Population conducted by Statistics Canada, Lancaster had a population of 729 living in 320 of its 342 total private dwellings, a change of from its 2016 population of 750. With a land area of , it had a population density of in 2021. == See also ==