Founded in Mar 6, 1840, Lake County is one of 88 counties in the state of Ohio. Historically, Lake County was formed from Geauga and Cuyahoga Counties. The city of Painesville is the county seat. With FIPS code of 85, Lake County has a population of 232,023 and area of 228.21 square miles (591 km2).
List of all cities in Lake County, OH alphabetically
| City/Town | Postal Code | Area Code |
| Concord Township, OH | 44060 | 440 |
| 44077 | 440 | |
| Eastlake, OH | 44095 | 440 |
| 44097 | 440 | |
| Fairport Harbor, OH | 44077 | 440 |
| Grand River, OH | 44045 | 440 |
| Kirtland, OH | 44094 | 440 |
| Kirtland Hills, OH | 44060 | 440 |
| 44094 | 440 | |
| Lakeline, OH | 44095 | 440 |
| Madison, OH | 44057 | 440 |
| Madison-on-the-Lake, OH | 44057 | 440 |
| Mentor, OH | 44060 | 440 |
| 44061 | 440 | |
| Mentor on the Lake, OH | 44060 | 440 |
| North Madison, OH | 44057 | 440 |
| North Perry, OH | 44081 | 440 |
| Painesville, OH | 44077 | 440 |
| Perry, OH | 44081 | 440 |
| South Madison, OH | 44057 | 440 |
| Timberlake, OH | 44095 | 440 |
| Waite Hill, OH | 44094 | 440 |
| Wickliffe, OH | 44092 | 440 |
| 44094 | 440 | |
| Willoughby, OH | 44094 | 440 |
| 44095 | 440 | |
| 44096 | 440 | |
| 44097 | 440 | |
| Willoughby Hills, OH | 44092 | 440 |
| 44094 | 440 | |
| Willowick, OH | 44092 | 440 |
| 44094 | 440 | |
| 44095 | 440 | |
| Wiloughby Hls, OH | 44092 | 440 |
| 44094 | 440 |