Jo Daviess County, Illinois
Jo Daviess County | |
|---|---|
 Hill terrain in the county, part of the Driftless Area | |
 Location within the U.S. state of Illinois | |
 Illinois's location within the U.S. | |
| Coordinates: 42°22′N 90°13′W / 42.36°N 90.21°W | |
| Country |  United States |
| State |  Illinois |
| Founded | 1827 |
| Named for | Joseph Hamilton Daveiss |
| Seat | Galena |
| Largest city | Galena |
| Area | |
| • Total | 619 sq mi (1,600 km2) |
| • Land | 601 sq mi (1,560 km2) |
| • Water | 18 sq mi (50 km2) 2.9% |
| Population (2010) | |
| • Total | 22,691 |
| • Estimate (2018) | 21,366 |
| • Density | 37/sq mi (14/km2) |
| Time zone | UTC−6 (Central) |
| • Summer (DST) | UTC−5 (CDT) |
| Congressional district | 17th |
| Website | www |
Jo Daviess County is a county in the U.S. state of Illinois. In the 2010 census, 22,678 people lived there. The county seat is Galena.
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