| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mentor-on-the-Lake | 1 | 7,113 | 7,143 | -0.1% | 4,410 | 2 | City |
| Kirtland | 2 | 6,926 | 6,935 | 0.01% | 415 | 17 | City |
| Chardon | 3 | 5,244 | 5,240 | -0.13% | 1,194 | 4 | City |
| Middlefield | 4 | 2,769 | 2,747 | 0.07% | 819 | 3 | Village |
| Burton | 5 | 1,424 | 1,410 | 0% | 1,281 | 1 | Village |
| Kirtland Hills | 6 | 688 | 690 | -0.15% | 123 | 6 | Village |
| Waite Hill | 7 | 517 | 538 | -0.77% | 124 | 4 | Village |
| Aquilla | 8 | 304 | 306 | -0.33% | 2,068 | 0 | Village |
Mentor-on-the-Lake is the largest city in Geauga County, with a population of 7,113.
Aquilla is the smallest city in Geauga County, with a population of 304.
There are 8 cities in Geauga County, Ohio.