37 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Union | 1 | 51,470 | 49,682 | 0.93% | 1,776 | 29 | Township |
| Miami | 2 | 45,574 | 43,962 | 0.94% | 1,391 | 33 | Township |
| Batavia | 3 | 28,760 | 27,684 | 0.98% | 724 | 40 | Township |
| Bethel | 4 | 17,964 | 18,046 | 0.19% | 487 | 37 | Township |
| Goshen | 5 | 16,731 | 16,087 | 0.99% | 491 | 34 | Township |
| Pierce | 6 | 15,675 | 15,103 | 0.97% | 686 | 23 | Township |
| Loveland | 7 | 13,270 | 13,304 | -0.05% | 2,503 | 5 | City |
| Montgomery | 8 | 10,977 | 10,851 | 0.23% | 2,068 | 5 | City |
| Tate | 9 | 9,490 | 9,165 | 0.9% | 204 | 47 | Township |
| Milford | 10 | 6,397 | 6,574 | -0.56% | 1,723 | 4 | City |
| The Village of Indian Hill | 11 | 6,092 | 6,082 | 0.03% | 312 | 20 | City |
| Goshen | 12 | 5,958 | 5,107 | 8.47% | 225 | 27 | Township |
| Williamsburg | 13 | 5,877 | 5,684 | 0.89% | 195 | 30 | Township |
| Stonelick | 14 | 5,867 | 5,667 | 0.91% | 199 | 29 | Township |
| Ohio | 15 | 5,756 | 5,530 | 0.98% | 429 | 13 | Township |
| Bethel | 16 | 4,957 | 4,771 | 0.96% | 148 | 33 | Township |
| Milford | 17 | 3,667 | 3,525 | 1.16% | 100 | 37 | Township |
| Goshen | 18 | 3,646 | 3,633 | 0.08% | 97 | 38 | Township |
| Goshen | 19 | 3,084 | 3,090 | 0.1% | 95 | 33 | Township |
| Goshen | 20 | 2,913 | 3,002 | -0.48% | 81 | 36 | Township |
| New Richmond | 21 | 2,812 | 2,727 | 0.61% | 796 | 4 | Village |
| Bethel | 22 | 2,699 | 2,621 | 0.56% | 1,891 | 1 | Village |
| Newtown | 23 | 2,683 | 2,702 | -0.15% | 1,298 | 2 | Village |
| Williamsburg | 24 | 2,660 | 2,583 | 0.57% | 1,039 | 3 | Village |
| Washington | 25 | 2,263 | 2,175 | 0.98% | 64 | 36 | Township |
| Batavia | 26 | 2,036 | 1,986 | 0.49% | 592 | 3 | Village |
| Milford | 27 | 2,035 | 1,909 | 1.29% | 79 | 26 | Township |
| Milford | 28 | 1,123 | 1,099 | 0.54% | 32 | 35 | Township |
| Owensville | 29 | 823 | 800 | 0.49% | 1,332 | 1 | Village |
| Felicity | 30 | 664 | 646 | 0.45% | 2,515 | 0 | Village |
| Goshen | 31 | 572 | 556 | 0.35% | 20 | 28 | Township |
| Goshen | 32 | 469 | 491 | -0.85% | 26 | 18 | Township |
| Bethel | 33 | 281 | 284 | 0% | 12 | 24 | Township |
| Moscow | 34 | 160 | 155 | 0.63% | 436 | 0 | Village |
| Butlerville | 35 | 155 | 157 | -0.64% | 1,422 | 0 | Village |
| Neville | 36 | 90 | 87 | 0% | 228 | 0 | Village |
| Chilo | 37 | 72 | 69 | 0% | 356 | 0 | Village |
Union is the largest city in Clermont County, with a population of 51,470.
Chilo is the smallest city in Clermont County, with a population of 72.
There are 37 cities in Clermont County, Ohio.