Grant County, Indiana

Grant County
County
Grant County Courthouse in Marion
Location within the U.S. state of Indiana
Indiana's location within the U.S.
Coordinates: 40°31′N 85°39′W / 40.52°N 85.65°W / 40.52; -85.65
Country	United States
State	Indiana
Founded	1831
Named for	Samuel and Moses Grant
Seat	Marion
Largest city	Marion
Area
• Total	414.90 sq mi (1,074.6 km2)
• Land	414.07 sq mi (1,072.4 km2)
• Water	0.82 sq mi (2.1 km2)  0.20%
Population  (2020)
• Total	66,674
• Estimate  (2025)	66,615[1]
• Density	160/sq mi (62/km2)
Time zone	UTC−5 (Eastern)
• Summer (DST)	UTC−4 (EDT)
Congressional district	5th
Website	www.grantcounty.net
Indiana county number 27

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.^[2] The county seat is Marion.^[3] Important paleontological discoveries, dating from the Pliocene epoch, have been made at the Pipe Creek Sinkhole in Grant County.^{[citation needed]}