64 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| West Chester | 1 | 67,775 | 64,972 | 1.18% | 1,904 | 36 | Township |
| Hamilton | 2 | 64,086 | 63,419 | 0.21% | 2,988 | 21 | City |
| Middletown | 3 | 52,608 | 51,023 | 0.61% | 1,997 | 26 | City |
| Liberty | 4 | 46,090 | 44,092 | 1.23% | 1,576 | 29 | Township |
| Fairfield | 5 | 45,139 | 44,912 | 0.1% | 2,167 | 21 | City |
| Hamilton | 6 | 33,408 | 30,754 | 1.29% | 950 | 35 | Township |
| Oxford | 7 | 25,243 | 25,475 | 0.62% | 690 | 37 | Township |
| Fairfield | 8 | 23,643 | 22,661 | 1.19% | 1,498 | 16 | Township |
| Oxford | 9 | 22,469 | 23,047 | -0.51% | 2,890 | 8 | City |
| Lemon | 10 | 17,757 | 16,945 | 1.4% | 1,202 | 15 | Township |
| Monroe | 11 | 16,769 | 16,149 | 0.96% | 552 | 30 | Township |
| Monroe | 12 | 16,072 | 15,460 | 0.76% | 1,018 | 16 | City |
| Trenton | 13 | 14,395 | 13,072 | 1.87% | 2,915 | 5 | City |
| Sharonville | 14 | 14,024 | 14,103 | -0.11% | 1,430 | 10 | City |
| Hamilton | 15 | 10,698 | 8,674 | 2.84% | 831 | 13 | Township |
| Fairfield | 16 | 9,949 | 9,797 | 0.12% | 278 | 36 | Township |
| Ross | 17 | 9,157 | 8,785 | 1.18% | 303 | 30 | Township |
| Hanover | 18 | 8,474 | 8,132 | 1.16% | 264 | 32 | Township |
| Monroe | 19 | 8,057 | 7,772 | 0.56% | 301 | 27 | Township |
| Monroe | 20 | 7,909 | 7,552 | 1.1% | 252 | 31 | Township |
| St. Clair | 21 | 6,962 | 6,694 | 1.1% | 331 | 21 | Township |
| Morgan | 22 | 5,574 | 5,355 | 1.12% | 152 | 37 | Township |
| Oxford | 23 | 4,629 | 4,752 | -0.62% | 188 | 25 | Township |
| Fairfield | 24 | 3,681 | 3,641 | 0.38% | 93 | 40 | Township |
| Reily | 25 | 2,777 | 2,671 | 1.13% | 76 | 37 | Township |
| Monroe | 26 | 2,729 | 2,745 | -0.11% | 75 | 36 | Township |
| Trenton | 27 | 2,621 | 2,316 | 1.87% | 99 | 26 | Township |
| New Miami | 28 | 2,291 | 2,214 | 0.66% | 2,534 | 1 | Village |
| Glendale | 29 | 2,277 | 2,299 | -0.22% | 1,387 | 2 | Village |
| Monroe | 30 | 2,240 | 2,208 | 0.04% | 93 | 24 | Township |
| Monroe | 31 | 2,132 | 2,151 | -0.05% | 56 | 38 | Township |
| Monroe | 32 | 2,082 | 2,087 | 0.58% | 59 | 35 | Township |
| Monroe | 33 | 2,005 | 2,032 | -0.25% | 56 | 36 | Township |
| Monroe | 34 | 2,003 | 2,047 | -0.1% | 55 | 36 | Township |
| Monroe | 35 | 1,884 | 1,923 | -1.1% | 77 | 25 | Township |
| Monroe | 36 | 1,803 | 1,798 | 0.28% | 58 | 31 | Township |
| Monroe | 37 | 1,710 | 1,651 | 0.88% | 75 | 23 | Township |
| Monroe | 38 | 1,650 | 1,664 | 0.06% | 64 | 26 | Township |
| Monroe | 39 | 1,617 | 1,597 | 0.37% | 67 | 24 | Township |
| Hamilton | 40 | 1,570 | 1,645 | -0.63% | 142 | 11 | Township |
| Oxford | 41 | 1,533 | 1,502 | 0.46% | 61 | 25 | Township |
| Fairfield | 42 | 1,473 | 1,440 | 0.75% | 46 | 32 | Township |
| Fairfield | 43 | 1,470 | 1,517 | -0.74% | 67 | 22 | Township |
| Monroe | 44 | 1,353 | 1,354 | 0.15% | 41 | 33 | Township |
| Monroe | 45 | 1,298 | 1,229 | 1.72% | 32 | 40 | Township |
| Fairfield | 46 | 1,112 | 1,102 | 0.63% | 43 | 26 | Township |
| Oxford | 47 | 1,096 | 1,142 | -0.63% | 42 | 26 | Township |
| Fairfield | 48 | 1,091 | 1,124 | -0.46% | 44 | 25 | Township |
| Oxford | 49 | 1,081 | 950 | 1.89% | 56 | 19 | Township |
| Monroe | 50 | 1,078 | 1,093 | 0% | 30 | 36 | Township |
| Monroe | 51 | 1,034 | 1,075 | -0.96% | 39 | 26 | Township |
| Ross | 52 | 852 | 819 | 1.31% | 24 | 36 | Township |
| Fairfield | 53 | 833 | 837 | 0% | 1,359 | 1 | Township |
| Oxford | 54 | 777 | 774 | 0.52% | 26 | 30 | Township |
| Seven Mile | 55 | 748 | 721 | 0.67% | 1,035 | 1 | Village |
| Monroe | 56 | 709 | 710 | 0.28% | 28 | 25 | Township |
| Millville | 57 | 655 | 637 | 0.46% | 1,123 | 1 | Village |
| Ross | 58 | 641 | 655 | -0.16% | 21 | 31 | Township |
| Monroe | 59 | 609 | 605 | 0.33% | 22 | 27 | Township |
| Hamilton | 60 | 548 | 547 | 0.37% | 21 | 26 | Township |
| Monroe | 61 | 539 | 539 | 0% | 22 | 25 | Township |
| Monroe | 62 | 440 | 432 | 0.23% | 17 | 26 | Township |
| College Corner | 63 | 399 | 389 | 0.5% | 1,596 | 0 | Village |
| Jacksonburg | 64 | 53 | 53 | 0% | 2,650 | 0 | Village |
West Chester is the largest city in Butler County, with a population of 67,775.
Jacksonburg is the smallest city in Butler County, with a population of 53.
There are 64 cities in Butler County, Ohio.