18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Toledo | 1 | 264,476 | 270,285 | -0.44% | 3,286 | 80 | City |
| Sylvania | 2 | 51,036 | 50,755 | 0.2% | 1,803 | 28 | Township |
| Oregon | 3 | 19,676 | 19,926 | -0.25% | 690 | 29 | City |
| Sylvania | 4 | 19,117 | 19,039 | 0.08% | 2,868 | 7 | City |
| Monclova | 5 | 14,975 | 14,856 | 0.25% | 688 | 22 | Township |
| Maumee | 6 | 13,565 | 13,863 | -0.44% | 1,350 | 10 | City |
| Waterville | 7 | 7,144 | 7,045 | 0.24% | 395 | 18 | Township |
| Waterville | 8 | 6,023 | 6,018 | 0.02% | 1,167 | 5 | City |
| Whitehouse | 9 | 5,102 | 5,005 | 0.37% | 1,183 | 4 | Village |
| Ottawa Hills | 10 | 4,800 | 4,800 | 0% | 2,552 | 2 | Village |
| Providence | 11 | 3,413 | 3,385 | 0.26% | 131 | 26 | Township |
| Washington | 12 | 3,080 | 3,057 | 0.23% | 1,496 | 2 | Township |
| Holland | 13 | 1,788 | 1,822 | -0.39% | 1,810 | 1 | Village |
| Reno Beach | 14 | 748 | 615 | 7.16% | 604 | 1 | CDP |
| Harding | 15 | 721 | 722 | -0.14% | 77 | 9 | Township |
| Neapolis | 16 | 678 | 680 | 2.57% | 955 | 1 | CDP |
| Berkey | 17 | 285 | 275 | 0.71% | 67 | 4 | Village |
| Harbor View | 18 | 89 | 89 | 0% | 3,870 | 0 | Village |
Toledo is the largest city in Lucas County, with a population of 264,476.
Harbor View is the smallest city in Lucas County, with a population of 89.
There are 18 cities in Lucas County, Ohio.