18 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Toledo | 1 | 261,989 | 270,276 | -0.63% | 3,255 | 80.49 | City |
| Sylvania township | 2 | 50,683 | 50,755 | -0.07% | 1,791 | 28.30 | Township |
| Oregon | 3 | 19,565 | 19,929 | -0.37% | 686 | 28.52 | City |
| Sylvania | 4 | 19,032 | 19,039 | -0.01% | 2,856 | 6.67 | City |
| Monclova township | 5 | 14,867 | 14,857 | -0.03% | 684 | 21.75 | Township |
| Maumee | 6 | 13,480 | 13,862 | -0.56% | 1,342 | 10.04 | City |
| Waterville township | 7 | 7,141 | 7,045 | 0.28% | 395 | 18.09 | Township |
| Waterville | 8 | 5,993 | 6,018 | -0.08% | 1,161 | 5.16 | City |
| Whitehouse | 9 | 5,101 | 5,005 | 0.37% | 1,183 | 4.31 | Village |
| Ottawa Hills | 10 | 4,776 | 4,800 | -0.1% | 2,539 | 1.88 | Village |
| Providence township | 11 | 3,381 | 3,383 | -0.06% | 130 | 26.07 | Township |
| Washington township | 12 | 3,051 | 3,056 | -0.07% | 1,482 | 2.06 | Township |
| Holland | 13 | 1,776 | 1,820 | -0.5% | 1,798 | 0.99 | Village |
| Reno Beach | 14 | 748 | 615 | 7.16% | 604 | 1.24 | CDP |
| Harding township | 15 | 719 | 722 | -0.14% | 76 | 9.40 | Township |
| Neapolis | 16 | 678 | 680 | 2.57% | 955 | 0.71 | CDP |
| Berkey | 17 | 288 | 278 | 0.7% | 68 | 4.24 | Village |
| Harbor View | 18 | 90 | 90 | 0% | 3,913 | 0.02 | Village |
Toledo is the largest city in Lucas County, with a population of 261,989.
Harbor View is the smallest city in Lucas County.
There are 18 cities in Lucas County, Ohio.