Johnson County, Iowa
Johnson County | |
|---|---|
Location within the U.S. state of Iowa | |
Iowa's location within the U.S. | |
| Coordinates: 41°40′00″N 91°35′00″W / 41.666666666667°N 91.583333333333°W | |
| Country | United States |
| State | Iowa |
| Founded | December 21, 1837 |
| Named after | Richard Mentor Johnson (1837–2020) Lulu Johnson (since 2020) |
| Seat | Iowa City |
| Largest city | Iowa City |
| Area | |
• Total | 623 sq mi (1,610 km2) |
| • Land | 614 sq mi (1,590 km2) |
| • Water | 9.1 sq mi (24 km2) 1.5% |
| Population (2020) | |
• Total | 152,854 |
• Estimate (2024) | 160,080 |
| • Density | 250/sq mi (100/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 1st |
| Website | www |
Johnson County is located in the U.S. state of Iowa. As of the 2020 census, the population was 152,854, making it the fourth-most populous county in Iowa. The county seat is Iowa City, home of the University of Iowa. Johnson County is included in the Iowa City metropolitan area, which is also included in the Cedar Rapids-Iowa City Corridor Combined Statistical Area.