56 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cincinnati | 1 | 317,570 | 309,604 | 0.42% | 4,076 | 78 | City |
| Anderson | 2 | 44,662 | 44,012 | 0.66% | 1,469 | 30 | Township |
| Delhi | 3 | 29,388 | 28,761 | 0.91% | 2,924 | 10 | Township |
| Harrison | 4 | 21,887 | 21,812 | 0.24% | 2,421 | 9 | Township |
| Forest Park | 5 | 19,965 | 20,168 | -0.17% | 3,096 | 6 | City |
| Norwood | 6 | 19,674 | 19,016 | 0.56% | 6,260 | 3 | City |
| Miami | 7 | 16,141 | 15,968 | 0.59% | 714 | 23 | Township |
| Symmes | 8 | 15,923 | 15,648 | 0.71% | 2,110 | 8 | Township |
| Harrison | 9 | 15,434 | 14,361 | 0.97% | 884 | 17 | Township |
| Harrison | 10 | 13,977 | 12,624 | 1.64% | 2,617 | 5 | City |
| Blue Ash | 11 | 13,721 | 13,405 | 0.39% | 1,809 | 8 | City |
| Springdale | 12 | 11,270 | 11,008 | 0.39% | 2,264 | 5 | City |
| Harrison | 13 | 10,865 | 8,297 | 3.29% | 395 | 28 | Township |
| Reading | 14 | 10,428 | 10,589 | -0.26% | 3,610 | 3 | City |
| Madeira | 15 | 9,565 | 9,495 | 0.13% | 2,854 | 3 | City |
| North College Hill | 16 | 9,503 | 9,650 | -0.25% | 5,219 | 2 | City |
| Harrison | 17 | 8,936 | 8,558 | 0.61% | 327 | 27 | Township |
| Wyoming | 18 | 8,792 | 8,759 | 0.07% | 3,049 | 3 | City |
| Cheviot | 19 | 8,585 | 8,750 | -0.31% | 7,363 | 1 | City |
| Mount Healthy | 20 | 6,881 | 6,985 | -0.25% | 4,603 | 1 | City |
| Whitewater | 21 | 6,551 | 6,370 | 0.83% | 259 | 25 | Township |
| Crosby | 22 | 6,295 | 6,027 | 0.77% | 318 | 20 | Township |
| Deer Park | 23 | 5,445 | 5,420 | 0.07% | 6,376 | 1 | City |
| Harrison | 24 | 5,141 | 5,146 | 0.12% | 223 | 23 | Township |
| Silverton | 25 | 4,833 | 4,907 | -0.25% | 4,342 | 1 | Village |
| Harrison | 26 | 4,327 | 4,308 | 0.56% | 121 | 36 | Township |
| Columbia | 27 | 4,312 | 4,265 | 0.61% | 1,856 | 2 | Township |
| Harrison | 28 | 4,102 | 4,243 | -0.46% | 111 | 37 | Township |
| St. Bernard | 29 | 3,949 | 4,029 | -0.33% | 2,573 | 2 | Village |
| Woodlawn | 30 | 3,915 | 3,908 | 0.03% | 1,532 | 3 | Village |
| Amberley | 31 | 3,848 | 3,844 | 0.03% | 1,105 | 3 | Village |
| Golf Manor | 32 | 3,793 | 3,804 | -0.05% | 6,540 | 1 | Village |
| Greenhills | 33 | 3,682 | 3,733 | -0.22% | 2,960 | 1 | Village |
| Lockland | 34 | 3,499 | 3,511 | -0.06% | 2,870 | 1 | Village |
| Mariemont | 35 | 3,472 | 3,516 | -0.2% | 3,884 | 1 | Village |
| Cleves | 36 | 3,373 | 3,414 | -0.21% | 2,182 | 2 | Village |
| Lincoln Heights | 37 | 3,138 | 3,140 | 0% | 4,223 | 1 | Village |
| Evendale | 38 | 2,653 | 2,668 | -0.08% | 556 | 5 | Village |
| Terrace Park | 39 | 2,349 | 2,352 | 0% | 1,981 | 1 | Village |
| Harrison | 40 | 2,232 | 2,314 | -1.2% | 71 | 31 | Township |
| Harrison | 41 | 2,146 | 2,171 | -0.05% | 63 | 34 | Township |
| Elmwood Place | 42 | 2,072 | 2,086 | -0.1% | 6,415 | 0 | Village |
| Harrison | 43 | 2,052 | 2,030 | 0.34% | 80 | 26 | Township |
| Fairfax | 44 | 1,758 | 1,766 | -0.06% | 2,257 | 1 | Village |
| Harrison | 45 | 1,561 | 1,551 | 0.06% | 94 | 17 | Township |
| Harrison | 46 | 1,512 | 1,515 | 0.13% | 42 | 36 | Township |
| Harrison | 47 | 1,250 | 1,271 | -0.24% | 46 | 27 | Township |
| Harrison | 48 | 1,167 | 1,176 | -0.17% | 32 | 36 | Township |
| Harrison | 49 | 1,058 | 1,021 | 1.15% | 29 | 36 | Township |
| Harrison | 50 | 1,039 | 1,059 | 0.29% | 30 | 34 | Township |
| Harrison | 51 | 962 | 983 | -0.41% | 31 | 31 | Township |
| Addyston | 52 | 908 | 926 | -0.33% | 1,071 | 1 | Village |
| Harrison | 53 | 882 | 867 | 0.46% | 36 | 24 | Township |
| Harrison | 54 | 879 | 865 | -0.57% | 37 | 24 | Township |
| North Bend | 55 | 834 | 834 | 0% | 763 | 1 | Village |
| Arlington Heights | 56 | 819 | 821 | 0% | 3,126 | 0 | Village |
Cincinnati is the largest city in Hamilton County, with a population of 317,570.
Arlington Heights is the smallest city in Hamilton County, with a population of 819.
There are 56 cities in Hamilton County, Ohio.