Carroll County, Indiana
| Carroll County | |
|---|---|
| Carroll County courthouse in Delphi | |
| Location within the U.S. state of Indiana | |
| Indiana's location within the U.S. | |
| Coordinates: 40°35′N 86°34′W / 40.58°N 86.56°W | |
| Country | United States | 
| State | Indiana | 
| Founded | January 17, 1828 (authorized) April 28, 1828 (organized) | 
| Named after | Charles Carroll of Carrollton | 
| Seat | Delphi | 
| Largest city | Delphi | 
| Area | |
|  • Total | 375.02 sq mi (971.3 km2) | 
| • Land | 372.22 sq mi (964.0 km2) | 
| • Water | 2.80 sq mi (7.3 km2) 0.75% | 
| Population  (2020) | |
|  • Total | 20,306 | 
|  • Estimate  (2023) | 20,525 | 
| • Density | 54/sq mi (21/km2) | 
| Time zone | UTC−5 (Eastern) | 
| • Summer (DST) | UTC−4 (EDT) | 
| Congressional district | 4th | 
| Website | www | 
| Indiana county number 8 | |
Carroll County is a county located in the U.S. state of Indiana. As of the 2020 United States census, the population was 20,306. The county seat is Delphi. Carroll County is part of the Lafayette, Indiana, Metropolitan Statistical Area.