17 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Napoleon township | 1 | 9,647 | 9,795 | -0.19% | 278 | 34.66 | Township |
| Napoleon | 2 | 8,678 | 8,858 | -0.41% | 1,397 | 6.21 | City |
| Liberty township | 3 | 2,465 | 2,476 | -0.04% | 77 | 31.97 | Township |
| Bartlow township | 4 | 2,148 | 2,192 | -0.28% | 59 | 36.24 | Township |
| Washington township | 5 | 2,070 | 1,970 | 0.98% | 72 | 28.83 | Township |
| Pleasant township | 6 | 1,904 | 1,914 | -0.1% | 53 | 36 | Township |
| Deshler | 7 | 1,551 | 1,590 | -0.51% | 678 | 2.29 | Village |
| Flatrock township | 8 | 1,199 | 1,226 | -0.33% | 34 | 34.91 | Township |
| Ridgeville township | 9 | 1,106 | 1,100 | 0.27% | 47 | 23.57 | Township |
| Liberty Center | 10 | 1,087 | 1,111 | -0.46% | 1,052 | 1.03 | Village |
| Holgate | 11 | 1,033 | 1,058 | -0.48% | 895 | 1.15 | Village |
| Freedom township | 12 | 913 | 929 | -0.44% | 39 | 23.61 | Township |
| McClure | 13 | 692 | 697 | -0.14% | 1,390 | 0.50 | Village |
| Hamler | 14 | 604 | 603 | 0% | 731 | 0.83 | Village |
| Ridgeville Corners | 15 | 316 | 296 | -2.47% | 346 | 0.91 | CDP |
| Malinta | 16 | 224 | 233 | -0.88% | 291 | 0.77 | Village |
| New Bavaria | 17 | 85 | 87 | 0% | 1,214 | 0.07 | Village |
Napoleon township is the largest city in Henry County, with a population of 9,647.
New Bavaria is the smallest city in Henry County.
There are 17 cities in Henry County, Ohio.