What Canada US border town is located in the third-least populous Maine county and houses a population of 889 people?
Perry, Maine: Perry is a town in Washington County, Maine, United States, on the Canada–United States border. Perry, Maine:  At the 2010 census, the town had a population of 889. Washington County, Maine:  As of the 2010 census, its population was 32,856, making it the third-least populous county in Maine.
Perry