37 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Union | 1 | 51,946 | 49,682 | 0.92% | 1,792 | 29 | Township |
| Miami | 2 | 45,999 | 43,962 | 0.93% | 1,404 | 33 | Township |
| Batavia | 3 | 29,038 | 27,684 | 0.97% | 731 | 40 | Township |
| Bethel | 4 | 17,998 | 18,046 | 0.19% | 487 | 37 | Township |
| Goshen | 5 | 16,895 | 16,087 | 0.98% | 496 | 34 | Township |
| Pierce | 6 | 15,825 | 15,103 | 0.96% | 693 | 23 | Township |
| Loveland | 7 | 13,263 | 13,304 | -0.05% | 2,502 | 5 | City |
| Montgomery | 8 | 11,002 | 10,851 | 0.23% | 2,073 | 5 | City |
| Tate | 9 | 9,575 | 9,165 | 0.9% | 205 | 47 | Township |
| Goshen | 10 | 6,423 | 5,107 | 7.8% | 242 | 27 | Township |
| Milford | 11 | 6,362 | 6,574 | -0.55% | 1,714 | 4 | City |
| The Village of Indian Hill | 12 | 6,094 | 6,082 | 0.03% | 312 | 20 | City |
| Williamsburg | 13 | 5,929 | 5,684 | 0.88% | 197 | 30 | Township |
| Stonelick | 14 | 5,920 | 5,667 | 0.9% | 201 | 29 | Township |
| Ohio | 15 | 5,812 | 5,530 | 0.97% | 433 | 13 | Township |
| Bethel | 16 | 5,004 | 4,771 | 0.95% | 150 | 33 | Township |
| Milford | 17 | 3,709 | 3,525 | 1.15% | 101 | 37 | Township |
| Goshen | 18 | 3,649 | 3,633 | 0.08% | 97 | 38 | Township |
| Goshen | 19 | 3,087 | 3,090 | 0.1% | 95 | 33 | Township |
| Goshen | 20 | 2,899 | 3,002 | -0.48% | 80 | 36 | Township |
| New Richmond | 21 | 2,829 | 2,727 | 0.6% | 801 | 4 | Village |
| Bethel | 22 | 2,715 | 2,621 | 0.59% | 1,903 | 1 | Village |
| Newtown | 23 | 2,679 | 2,702 | -0.15% | 1,296 | 2 | Village |
| Williamsburg | 24 | 2,676 | 2,583 | 0.6% | 1,046 | 3 | Village |
| Washington | 25 | 2,285 | 2,175 | 0.97% | 64 | 36 | Township |
| Milford | 26 | 2,061 | 1,909 | 1.28% | 80 | 26 | Township |
| Batavia | 27 | 2,046 | 1,986 | 0.49% | 594 | 3 | Village |
| Milford | 28 | 1,129 | 1,099 | 0.53% | 32 | 35 | Township |
| Owensville | 29 | 828 | 800 | 0.61% | 1,340 | 1 | Village |
| Felicity | 30 | 668 | 646 | 0.6% | 2,530 | 0 | Village |
| Goshen | 31 | 574 | 556 | 0.35% | 20 | 28 | Township |
| Goshen | 32 | 465 | 491 | -0.85% | 26 | 18 | Township |
| Bethel | 33 | 281 | 284 | 0% | 12 | 24 | Township |
| Moscow | 34 | 161 | 155 | 0.63% | 439 | 0 | Village |
| Butlerville | 35 | 155 | 157 | 0% | 1,422 | 0 | Village |
| Neville | 36 | 91 | 87 | 1.11% | 230 | 0 | Village |
| Chilo | 37 | 73 | 69 | 1.39% | 361 | 0 | Village |
Union is the largest city in Clermont County, with a population of 51,946.
Chilo is the smallest city in Clermont County, with a population of 73.
There are 37 cities in Clermont County, Ohio.