Penasse is an unincorporated community in Angle Township, Lake of the Woods County, Minnesota, United States. Penasse is located on Penasse Island in Lake of the Woods, in the northern part of Northwest Angle. Its location makes it the northernmost populated place in the contiguous United States. The community was named for Tom Penasse, an American Indian from the area; it had a post office from 1920 to 1969. The French built Fort Saint Charles nearby in 1732.