McKean County is a rural county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 40,432. Its county seat is Smethport. The county was created in 1804 and organized in 1826. It was named in honor of former Pennsylvania Governor and Declaration of Independence signer Thomas McKean. The county is part of the North Central Pennsylvania region of the state.

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.