64 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| West Chester | 1 | 68,568 | 64,972 | 1.17% | 1,926 | 36 | Township |
| Hamilton | 2 | 64,220 | 63,419 | 0.21% | 2,994 | 21 | City |
| Middletown | 3 | 52,925 | 51,023 | 0.6% | 2,009 | 26 | City |
| Liberty | 4 | 46,651 | 44,092 | 1.22% | 1,595 | 29 | Township |
| Fairfield | 5 | 45,185 | 44,912 | 0.1% | 2,169 | 21 | City |
| Hamilton | 6 | 33,835 | 30,754 | 1.28% | 963 | 35 | Township |
| Oxford | 7 | 25,399 | 25,475 | 0.62% | 695 | 37 | Township |
| Fairfield | 8 | 23,921 | 22,661 | 1.18% | 1,516 | 16 | Township |
| Oxford | 9 | 22,354 | 23,047 | -0.51% | 2,875 | 8 | City |
| Lemon | 10 | 18,003 | 16,945 | 1.39% | 1,218 | 15 | Township |
| Monroe | 11 | 16,929 | 16,149 | 0.95% | 557 | 30 | Township |
| Monroe | 12 | 16,195 | 15,460 | 0.77% | 1,026 | 16 | City |
| Trenton | 13 | 14,660 | 13,072 | 1.84% | 2,969 | 5 | City |
| Sharonville | 14 | 14,008 | 14,103 | -0.11% | 1,428 | 10 | City |
| Hamilton | 15 | 10,993 | 8,674 | 2.76% | 854 | 13 | Township |
| Fairfield | 16 | 9,961 | 9,797 | 0.12% | 278 | 36 | Township |
| Ross | 17 | 9,264 | 8,785 | 1.17% | 307 | 30 | Township |
| Hanover | 18 | 8,571 | 8,132 | 1.14% | 267 | 32 | Township |
| Monroe | 19 | 8,102 | 7,772 | 0.56% | 302 | 27 | Township |
| Monroe | 20 | 7,995 | 7,552 | 1.09% | 254 | 31 | Township |
| St. Clair | 21 | 7,038 | 6,694 | 1.09% | 334 | 21 | Township |
| Morgan | 22 | 5,636 | 5,355 | 1.11% | 153 | 37 | Township |
| Oxford | 23 | 4,600 | 4,752 | -0.63% | 186 | 25 | Township |
| Fairfield | 24 | 3,695 | 3,641 | 0.38% | 93 | 40 | Township |
| Reily | 25 | 2,808 | 2,671 | 1.12% | 77 | 37 | Township |
| Monroe | 26 | 2,726 | 2,745 | -0.11% | 75 | 36 | Township |
| Trenton | 27 | 2,669 | 2,316 | 1.83% | 101 | 26 | Township |
| New Miami | 28 | 2,307 | 2,214 | 0.7% | 2,552 | 1 | Village |
| Glendale | 29 | 2,273 | 2,299 | -0.18% | 1,384 | 2 | Village |
| Monroe | 30 | 2,241 | 2,208 | 0.04% | 93 | 24 | Township |
| Monroe | 31 | 2,131 | 2,151 | -0.05% | 56 | 38 | Township |
| Monroe | 32 | 2,094 | 2,087 | 0.58% | 60 | 35 | Township |
| Monroe | 33 | 2,001 | 2,047 | -0.1% | 55 | 36 | Township |
| Monroe | 34 | 2,000 | 2,032 | -0.25% | 56 | 36 | Township |
| Monroe | 35 | 1,863 | 1,923 | -1.11% | 76 | 25 | Township |
| Monroe | 36 | 1,808 | 1,798 | 0.28% | 58 | 31 | Township |
| Monroe | 37 | 1,725 | 1,651 | 0.88% | 75 | 23 | Township |
| Monroe | 38 | 1,651 | 1,664 | 0.06% | 64 | 26 | Township |
| Monroe | 39 | 1,623 | 1,597 | 0.37% | 67 | 24 | Township |
| Hamilton | 40 | 1,560 | 1,645 | -0.64% | 141 | 11 | Township |
| Oxford | 41 | 1,540 | 1,502 | 0.46% | 61 | 25 | Township |
| Fairfield | 42 | 1,484 | 1,440 | 0.75% | 46 | 32 | Township |
| Fairfield | 43 | 1,459 | 1,517 | -0.75% | 66 | 22 | Township |
| Monroe | 44 | 1,355 | 1,354 | 0.15% | 41 | 33 | Township |
| Monroe | 45 | 1,320 | 1,229 | 1.69% | 33 | 40 | Township |
| Fairfield | 46 | 1,119 | 1,102 | 0.63% | 43 | 26 | Township |
| Oxford | 47 | 1,101 | 950 | 1.85% | 57 | 19 | Township |
| Oxford | 48 | 1,089 | 1,142 | -0.64% | 42 | 26 | Township |
| Fairfield | 49 | 1,086 | 1,124 | -0.46% | 44 | 25 | Township |
| Monroe | 50 | 1,078 | 1,093 | 0% | 30 | 36 | Township |
| Monroe | 51 | 1,024 | 1,075 | -0.97% | 39 | 26 | Township |
| Ross | 52 | 863 | 819 | 1.29% | 24 | 36 | Township |
| Fairfield | 53 | 833 | 837 | 0% | 1,359 | 1 | Township |
| Oxford | 54 | 781 | 774 | 0.51% | 26 | 30 | Township |
| Seven Mile | 55 | 754 | 721 | 0.8% | 1,043 | 1 | Village |
| Monroe | 56 | 711 | 710 | 0.28% | 28 | 25 | Township |
| Millville | 57 | 659 | 637 | 0.61% | 1,130 | 1 | Village |
| Ross | 58 | 640 | 655 | -0.16% | 21 | 31 | Township |
| Monroe | 59 | 611 | 605 | 0.33% | 22 | 27 | Township |
| Hamilton | 60 | 550 | 547 | 0.36% | 22 | 26 | Township |
| Monroe | 61 | 539 | 539 | 0% | 22 | 25 | Township |
| Monroe | 62 | 441 | 432 | 0.23% | 17 | 26 | Township |
| College Corner | 63 | 401 | 389 | 0.5% | 1,604 | 0 | Village |
| Jacksonburg | 64 | 53 | 53 | 0% | 2,650 | 0 | Village |
West Chester is the largest city in Butler County, with a population of 68,568.
Jacksonburg is the smallest city in Butler County, with a population of 53.
There are 64 cities in Butler County, Ohio.