12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Galena | 1 | 3,205 | 3,317 | -0.68% | 694 | 4.62 | City |
| The Galena Territory | 2 | 1,743 | 1,424 | 2.71% | 158 | 11.01 | CDP |
| Stockton | 3 | 1,669 | 1,733 | -0.77% | 889 | 1.88 | Village |
| East Dubuque | 4 | 1,473 | 1,503 | -0.41% | 512 | 2.88 | City |
| Warren | 5 | 1,276 | 1,330 | -0.85% | 1,235 | 1.03 | Village |
| Hanover | 6 | 827 | 862 | -0.84% | 737 | 1.12 | Village |
| Apple Canyon Lake | 7 | 740 | 639 | 1.65% | 199 | 3.72 | CDP |
| Elizabeth | 8 | 688 | 705 | -0.43% | 746 | 0.92 | Village |
| Scales Mound | 9 | 421 | 433 | -0.47% | 670 | 0.63 | Village |
| Apple River | 10 | 332 | 339 | -0.3% | 471 | 0.70 | Village |
| Menominee | 11 | 210 | 212 | 0% | 110 | 1.91 | Village |
| Nora | 12 | 109 | 109 | 0% | 131 | 0.83 | Village |
Galena is the largest city in Jo Daviess County, with a population of 3,205.
Nora is the smallest city in Jo Daviess County.
There are 12 cities in Jo Daviess County, Illinois.