27 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bellefontaine | 1 | 14,049 | 14,109 | -0.09% | 1,391 | 10.10 | City |
| Lake township | 2 | 12,673 | 12,748 | -0.11% | 1,021 | 12.42 | Township |
| Stokes township | 3 | 4,558 | 4,507 | 0.22% | 140 | 32.59 | Township |
| Liberty township | 4 | 3,940 | 3,946 | -0.05% | 258 | 15.25 | Township |
| Washington township | 5 | 3,412 | 3,415 | 0% | 150 | 22.82 | Township |
| Richland township | 6 | 2,625 | 2,629 | 0% | 90 | 29.03 | Township |
| Miami township | 7 | 2,123 | 2,112 | 0.19% | 92 | 23.07 | Township |
| Rushcreek township | 8 | 2,119 | 2,120 | 0.05% | 43 | 49.01 | Township |
| McArthur township | 9 | 1,929 | 1,929 | 0% | 71 | 27.17 | Township |
| West Liberty | 10 | 1,750 | 1,765 | -0.17% | 1,438 | 1.22 | Village |
| Bokescreek township | 11 | 1,364 | 1,356 | 0.29% | 40 | 33.86 | Township |
| Russells Point | 12 | 1,323 | 1,323 | 0% | 1,423 | 0.93 | Village |
| De Graff | 13 | 1,251 | 1,250 | 0% | 1,247 | 1 | Village |
| Lakeview | 14 | 1,211 | 1,181 | 0.5% | 1,710 | 0.71 | Village |
| Zane township | 15 | 1,211 | 1,218 | -0.08% | 55 | 22.02 | Township |
| Pleasant township | 16 | 1,124 | 1,126 | -0.09% | 46 | 24.22 | Township |
| Belle Center | 17 | 803 | 808 | -0.12% | 1,150 | 0.70 | Village |
| West Mansfield | 18 | 758 | 758 | 0% | 911 | 0.83 | Village |
| Union township | 19 | 750 | 753 | 0% | 33 | 22.89 | Township |
| Quincy | 20 | 545 | 539 | 0.18% | 486 | 1.12 | Village |
| Rushsylvania | 21 | 495 | 490 | 0.2% | 632 | 0.78 | Village |
| East Liberty | 22 | 414 | 390 | 0.98% | 263 | 1.58 | CDP |
| Huntsville | 23 | 409 | 403 | 0.25% | 1,350 | 0.30 | Village |
| Bloomfield township | 24 | 404 | 408 | -0.25% | 18 | 22.81 | Township |
| Valley Hi | 25 | 230 | 229 | 0% | 370 | 0.62 | Village |
| Zanesfield | 26 | 188 | 190 | 0% | 1,774 | 0.11 | Village |
| Lewistown | 27 | 123 | 265 | -5.38% | 160 | 0.77 | CDP |
Bellefontaine is the largest city in Logan County, with a population of 14,049.
Lewistown is the smallest city in Logan County.
There are 27 cities in Logan County, Ohio.