Mount Jewett is a borough in McKean County, Pennsylvania, United States. The population was 849 at the 2020 census. The students of the borough attend school in the Kane Area School District, even though the borough is surrounded by Hamlin Township—belonging to neighboring Smethport Area School District. Mount Jewett is near to the Kinzua Bridge State Park, which includes the Kinzua Bridge Sky Walk and Kinzua Viaduct. The current mayor is Brianna Howard.