Grove City is a borough in Mercer County, Pennsylvania, United States, located approximately 60 miles (97 km) north of Pittsburgh and 75 miles (121 km) south of Erie. It is the home of Grove City College, a private conservative Christian liberal arts college; General Electric; Instron; USIS; and a number of small businesses. It is also the home to George Junior Republic, an all-boys institution. GJR serves to house, school, and treat 400 high school-aged boys from troubled backgrounds.