Founded in Mar 1, 1806, Geauga County is one of 88 counties in the state of Ohio. Historically, Geauga County was formed from Trumbull County. The city of Chardon is the county seat. With FIPS code of 55, Geauga County has a population of 95,565 and area of 403.66 square miles (1,045 km2).
List of all cities in Geauga County, OH alphabetically
| City/Town | Postal Code | Area Code |
| Asm International, OH | 44073 | 440 |
| Auburn Township, OH | 44023 | 440 |
| Bainbridge Township, OH | 44023 | 440 |
| Burton, OH | 44021 | 440 |
| Chagrin Falls, OH | 44023 | 440 |
| Chardon, OH | 44024 | 440 |
| Chesterland, OH | 44026 | 440 |
| Concord Township, OH | 44024 | 440 |
| East Claridon, OH | 44033 | 440 |
| Huntsburg, OH | 44046 | 440 |
| Kirtland, OH | 44024 | 440 |
| Materials Park, OH | 44073 | 440 |
| Middlefield, OH | 44062 | 440 |
| Montville, OH | 44064 | 440 |
| Newbury, OH | 44065 | 440 |
| Novelty, OH | 44072 | 440 |
| 44073 | 440 | |
| Parkman, OH | 44080 | 440 |
| Russell, OH | 44072 | 440 |
| Russell Township, OH | 44072 | 440 |
| Thompson, OH | 44086 | 440 |