Fairmount is a town in Fairmount Township, Grant County in the east central part of the U.S. state of Indiana. The population was 2,954 at the 2010 census. It is 55 miles (88 km) northeast of Indianapolis. Largely a bedroom community for nearby Marion, Fairmount is best known as the boyhood home of actor James Dean, who is buried there.

Grant County is a county in central Indiana in the United States Midwest. At the time of the 2020 census, the population was 66,674. The county seat is Marion. Important paleontological discoveries, dating from the Pliocene epoch, have been made at the Pipe Creek Sinkhole in Grant County.