Grant County, Indiana
Grant County, Indiana | |
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Grant County Courthouse in Marion | |
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Seal Logo | |
Location within the U.S. state of Indiana | |
| Coordinates: 40°31′N 85°39′W / 40.52°N 85.65°W | |
| Country | United States |
| State | Indiana |
| Founded | 1831 |
| Named after | 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 |
| • Density | 161.02/sq mi (62.171/km2) |
| Time zone | UTC−5 (Eastern) |
| • Summer (DST) | UTC−4 (EDT) |
| Congressional district | 5th |
| Website | www |
| 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. The county seat is Marion. Important paleontological discoveries, dating from the Pliocene epoch, have been made at the Pipe Creek Sinkhole in Grant County.