Smethport is a borough in and county seat of McKean County, Pennsylvania, United States. The mayor is Wayne V. Foltz. The population was 1,430 at the 2020 census. Smethport is part of the Bradford, PA Micropolitan Statistical Area. Smethport, having the coldest temperature ever recorded in Pennsylvania, is the coldest place in Pennsylvania and one of the coldest towns in the contiguous United States.