8 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mentor-on-the-Lake | 1 | 7,095 | 7,128 | -0.07% | 4,399 | 2 | City |
| Kirtland | 2 | 6,903 | 6,935 | -0.07% | 414 | 17 | City |
| Chardon | 3 | 5,229 | 5,241 | -0.04% | 1,191 | 4 | City |
| Middlefield | 4 | 2,748 | 2,750 | 0% | 813 | 3 | Village |
| Burton | 5 | 1,407 | 1,410 | 0% | 1,265 | 1 | Village |
| Kirtland Hills | 6 | 691 | 691 | 0% | 124 | 6 | Village |
| Waite Hill | 7 | 520 | 543 | -0.76% | 124 | 4 | Village |
| Aquilla | 8 | 303 | 306 | 0% | 2,061 | 0 | Village |
Mentor-on-the-Lake is the largest city in Geauga County, with a population of 7,095.
Aquilla is the smallest city in Geauga County, with a population of 303.
There are 8 cities in Geauga County, Ohio.