Hermitage is a city in Mercer County, Pennsylvania, United States. It is part of the Youngstown-Warren-Boardman, OH-PA Metropolitan Area.
Formerly known as Hickory Township (hence Hickory High School with its Hickory Hornet mascot). The City of Hermitage, in Mercer County, Pennsylvania, was first settled in 1796, and the Township of Hickory was incorporated in 1832 from portions of the Shenango and Pymatuning townships. Following the incorporation of the cities of Sharon and Farrell and the Boroughs of Sharpsville and Wheatland, the remainder of the Township was incorporated into a First Class Township.
According to the United States Census Bureau, the city has a total area of 29.6 square miles (77 km2), of which, 29.5 square miles (76 km2) of it is land and 0.1 square miles (0.26 km2) of it (0.37%) is water. Based on area, Hermitage is the 3rd largest city in Pennsylvania.