29 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Norwalk | 1 | 17,196 | 17,030 | 0.19% | 1,940 | 8.87 | City |
| Bellevue | 2 | 8,123 | 8,225 | -0.25% | 1,325 | 6.13 | City |
| Willard | 3 | 6,074 | 6,193 | -0.39% | 1,697 | 3.58 | City |
| Norwalk township | 4 | 3,415 | 3,472 | -0.26% | 194 | 17.61 | Township |
| New London township | 5 | 3,159 | 3,232 | -0.38% | 123 | 25.71 | Township |
| Wakeman township | 6 | 2,783 | 2,779 | -0.07% | 108 | 25.74 | Township |
| New Haven township | 7 | 2,385 | 2,428 | -0.25% | 103 | 23.09 | Township |
| New London | 8 | 2,350 | 2,412 | -0.51% | 1,066 | 2.21 | Village |
| Ridgefield township | 9 | 2,160 | 2,184 | -0.14% | 85 | 25.48 | Township |
| Bronson township | 10 | 1,978 | 1,963 | 0.36% | 76 | 26.16 | Township |
| Plymouth township | 11 | 1,960 | 1,969 | -0.1% | 76 | 25.68 | Township |
| Plymouth township | 12 | 1,885 | 1,908 | -0.11% | 85 | 22.30 | Township |
| Plymouth | 13 | 1,681 | 1,708 | -0.3% | 673 | 2.50 | Village |
| Clarksfield township | 14 | 1,585 | 1,565 | 0.38% | 59 | 26.64 | Township |
| Townsend township | 15 | 1,544 | 1,557 | -0.06% | 60 | 25.75 | Township |
| Greenwich | 16 | 1,381 | 1,401 | -0.29% | 910 | 1.52 | Village |
| Monroeville | 17 | 1,267 | 1,299 | -0.47% | 905 | 1.40 | Village |
| Peru township | 18 | 1,040 | 1,064 | -0.29% | 41 | 25.62 | Township |
| Hartland township | 19 | 1,027 | 1,048 | -0.29% | 39 | 26.02 | Township |
| Wakeman | 20 | 1,022 | 991 | 0.59% | 1,239 | 0.82 | Village |
| Fitchville township | 21 | 1,007 | 1,023 | -0.2% | 39 | 25.88 | Township |
| Greenwich township | 22 | 1,006 | 1,022 | -0.3% | 41 | 24.74 | Township |
| Lyme township | 23 | 853 | 867 | -0.23% | 37 | 22.79 | Township |
| Holiday Lakes | 24 | 688 | 647 | -0.58% | 397 | 1.73 | CDP |
| New Haven | 25 | 550 | 332 | 1.85% | 445 | 1.24 | CDP |
| Sherman township | 26 | 484 | 483 | 0.21% | 19 | 25.87 | Township |
| North Fairfield | 27 | 451 | 463 | -0.44% | 976 | 0.46 | Village |
| Collins | 28 | 395 | 443 | -3.66% | 86 | 4.62 | CDP |
| Celeryville | 29 | 80 | 84 | -10.11% | 155 | 0.52 | CDP |
Norwalk is the largest city in Huron County, with a population of 17,196.
Celeryville is the smallest city in Huron County.
There are 29 cities in Huron County, Ohio.