13 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mentor | 1 | 46,599 | 47,424 | -0.35% | 1,676 | 27.80 | City |
| Willoughby | 2 | 24,357 | 23,871 | 0.4% | 2,379 | 10.24 | City |
| Painesville | 3 | 20,817 | 20,286 | 0.51% | 3,050 | 6.83 | City |
| Eastlake | 4 | 17,173 | 17,647 | -0.55% | 2,680 | 6.41 | City |
| Willowick | 5 | 14,054 | 14,226 | -0.24% | 5,540 | 2.54 | City |
| Wickliffe | 6 | 12,583 | 12,665 | -0.13% | 2,730 | 4.61 | City |
| Willoughby Hills | 7 | 9,912 | 10,016 | -0.21% | 921 | 10.76 | City |
| Madison | 8 | 3,402 | 3,437 | -0.21% | 669 | 5.09 | Village |
| Fairport Harbor | 9 | 3,062 | 3,109 | -0.29% | 2,981 | 1.03 | Village |
| Perry | 10 | 1,592 | 1,607 | -0.19% | 701 | 2.27 | Village |
| Timberlake | 11 | 601 | 628 | -0.83% | 2,848 | 0.21 | Village |
| Grand River | 12 | 391 | 398 | -0.26% | 666 | 0.59 | Village |
| Lakeline | 13 | 207 | 217 | -0.96% | 2,352 | 0.09 | Village |
Mentor is the largest city in Lake County, with a population of 46,599.
Lakeline is the smallest city in Lake County.
There are 13 cities in Lake County, Ohio.