56 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cincinnati | 1 | 316,242 | 309,604 | 0.42% | 4,059 | 78 | City |
| Anderson | 2 | 44,371 | 44,012 | 0.66% | 1,459 | 30 | Township |
| Delhi | 3 | 29,124 | 28,761 | 0.91% | 2,898 | 10 | Township |
| Harrison | 4 | 21,834 | 21,812 | 0.24% | 2,416 | 9 | Township |
| Forest Park | 5 | 19,999 | 20,168 | -0.17% | 3,101 | 6 | City |
| Norwood | 6 | 19,564 | 19,016 | 0.56% | 6,225 | 3 | City |
| Miami | 7 | 16,047 | 15,968 | 0.59% | 710 | 23 | Township |
| Symmes | 8 | 15,811 | 15,648 | 0.71% | 2,096 | 8 | Township |
| Harrison | 9 | 15,286 | 14,361 | 0.98% | 876 | 17 | Township |
| Harrison | 10 | 13,751 | 12,624 | 1.66% | 2,575 | 5 | City |
| Blue Ash | 11 | 13,668 | 13,405 | 0.38% | 1,802 | 8 | City |
| Springdale | 12 | 11,226 | 11,008 | 0.38% | 2,255 | 5 | City |
| Harrison | 13 | 10,519 | 8,297 | 3.4% | 382 | 28 | Township |
| Reading | 14 | 10,455 | 10,589 | -0.26% | 3,619 | 3 | City |
| Madeira | 15 | 9,553 | 9,495 | 0.12% | 2,851 | 3 | City |
| North College Hill | 16 | 9,527 | 9,650 | -0.26% | 5,232 | 2 | City |
| Harrison | 17 | 8,882 | 8,558 | 0.61% | 325 | 27 | Township |
| Wyoming | 18 | 8,786 | 8,759 | 0.06% | 3,046 | 3 | City |
| Cheviot | 19 | 8,612 | 8,750 | -0.32% | 7,386 | 1 | City |
| Mount Healthy | 20 | 6,898 | 6,985 | -0.26% | 4,614 | 1 | City |
| Whitewater | 21 | 6,497 | 6,370 | 0.84% | 256 | 25 | Township |
| Crosby | 22 | 6,247 | 6,027 | 0.77% | 316 | 20 | Township |
| Deer Park | 23 | 5,441 | 5,420 | 0.07% | 6,371 | 1 | City |
| Harrison | 24 | 5,135 | 5,146 | 0.12% | 223 | 23 | Township |
| Silverton | 25 | 4,845 | 4,907 | -0.27% | 4,353 | 1 | Village |
| Harrison | 26 | 4,303 | 4,308 | 0.56% | 120 | 36 | Township |
| Columbia | 27 | 4,286 | 4,265 | 0.61% | 1,845 | 2 | Township |
| Harrison | 28 | 4,121 | 4,243 | -0.46% | 112 | 37 | Township |
| St. Bernard | 29 | 3,962 | 4,029 | -0.35% | 2,581 | 2 | Village |
| Woodlawn | 30 | 3,914 | 3,908 | 0.03% | 1,532 | 3 | Village |
| Amberley | 31 | 3,847 | 3,844 | 0% | 1,105 | 3 | Village |
| Golf Manor | 32 | 3,795 | 3,804 | -0.05% | 6,543 | 1 | Village |
| Greenhills | 33 | 3,690 | 3,733 | -0.24% | 2,966 | 1 | Village |
| Lockland | 34 | 3,501 | 3,511 | -0.06% | 2,872 | 1 | Village |
| Mariemont | 35 | 3,479 | 3,516 | -0.23% | 3,891 | 1 | Village |
| Cleves | 36 | 3,380 | 3,414 | -0.21% | 2,186 | 2 | Village |
| Lincoln Heights | 37 | 3,138 | 3,140 | -0.03% | 4,223 | 1 | Village |
| Evendale | 38 | 2,655 | 2,668 | -0.11% | 557 | 5 | Village |
| Terrace Park | 39 | 2,349 | 2,352 | -0.04% | 1,981 | 1 | Village |
| Harrison | 40 | 2,259 | 2,314 | -1.18% | 72 | 31 | Township |
| Harrison | 41 | 2,147 | 2,171 | -0.05% | 63 | 34 | Township |
| Elmwood Place | 42 | 2,074 | 2,086 | -0.14% | 6,421 | 0 | Village |
| Harrison | 43 | 2,045 | 2,030 | 0.34% | 80 | 26 | Township |
| Fairfax | 44 | 1,759 | 1,766 | -0.11% | 2,258 | 1 | Village |
| Harrison | 45 | 1,560 | 1,551 | 0.06% | 94 | 17 | Township |
| Harrison | 46 | 1,510 | 1,515 | 0.13% | 42 | 36 | Township |
| Harrison | 47 | 1,253 | 1,271 | -0.24% | 46 | 27 | Township |
| Harrison | 48 | 1,169 | 1,176 | -0.17% | 32 | 36 | Township |
| Harrison | 49 | 1,046 | 1,021 | 1.16% | 29 | 36 | Township |
| Harrison | 50 | 1,036 | 1,059 | 0.29% | 30 | 34 | Township |
| Harrison | 51 | 966 | 983 | -0.41% | 31 | 31 | Township |
| Addyston | 52 | 911 | 926 | -0.33% | 1,074 | 1 | Village |
| Harrison | 53 | 884 | 865 | -0.56% | 37 | 24 | Township |
| Harrison | 54 | 878 | 867 | 0.46% | 36 | 24 | Township |
| North Bend | 55 | 834 | 834 | 0% | 763 | 1 | Village |
| Arlington Heights | 56 | 819 | 821 | -0.12% | 3,126 | 0 | Village |
Cincinnati is the largest city in Hamilton County, with a population of 316,242.
Arlington Heights is the smallest city in Hamilton County, with a population of 819.
There are 56 cities in Hamilton County, Ohio.