Grove City is a borough in Mercer County, Pennsylvania, approximately north of Pittsburgh, and 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. Historically a traditional industrial center, Grove City has manufactured locomotive engines, carriages, gas engines, foundry products, and motor trucks.
In 1900, the population numbered 1,599; in 1910, 3,674 people lived there; and in 1940, 6,296 people lived there. At the 2000 census, the population was 8,024. Grove City is part of the Youngstown-Warren-Boardman, OH-PA Metropolitan Statistical Area.