Westfield is a borough in Tioga County, Pennsylvania, United States. The population was 1,113 at the time of the 2020 census. Westfield is located at 41°55′4″N 77°32′25″W / 41.91778°N 77.54028°W. According to the United States Census Bureau, the borough has a total area of 1.0 square mile, all of it land.