73 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| West Chester township | 1 | 66,444 | 64,975 | 0.61% | 1,867 | 35.59 | Township |
| Hamilton | 2 | 62,722 | 63,409 | -0.22% | 2,924 | 21.45 | City |
| Middletown | 3 | 51,780 | 51,025 | 0.29% | 1,978 | 26.18 | City |
| Liberty township | 4 | 45,184 | 44,086 | 0.65% | 1,545 | 29.25 | Township |
| Fairfield | 5 | 44,141 | 44,905 | -0.35% | 2,119 | 20.83 | City |
| Hamilton township | 6 | 33,309 | 30,752 | 1.42% | 948 | 35.15 | Township |
| Oxford township | 7 | 27,509 | 25,474 | 5.19% | 752 | 36.56 | Township |
| Fairfield township | 8 | 23,190 | 22,674 | 0.61% | 1,470 | 15.78 | Township |
| Oxford | 9 | 21,868 | 23,047 | -1.07% | 2,813 | 7.78 | City |
| Lemon township | 10 | 17,360 | 16,947 | 0.7% | 1,175 | 14.78 | Township |
| Monroe township | 11 | 16,647 | 16,147 | 0.62% | 548 | 30.38 | Township |
| Monroe | 12 | 15,693 | 15,460 | 0.3% | 994 | 15.78 | City |
| Trenton | 13 | 14,215 | 13,072 | 1.64% | 2,879 | 4.94 | City |
| Sharonville | 14 | 13,738 | 14,097 | -0.52% | 1,401 | 9.81 | City |
| Hamilton township | 15 | 11,868 | 8,674 | 8.4% | 922 | 12.87 | Township |
| Beckett Ridge | 16 | 10,053 | 9,493 | 0.57% | 2,094 | 4.80 | CDP |
| Fairfield township | 17 | 9,977 | 9,799 | 0.2% | 279 | 35.79 | Township |
| Ross township | 18 | 8,973 | 8,785 | 0.58% | 297 | 30.20 | Township |
| Hanover township | 19 | 8,294 | 8,129 | 0.55% | 258 | 32.12 | Township |
| Monroe township | 20 | 8,037 | 7,769 | 0.56% | 300 | 26.81 | Township |
| Monroe township | 21 | 7,860 | 7,550 | 0.86% | 250 | 31.42 | Township |
| St. Clair township | 22 | 6,844 | 6,695 | 0.59% | 325 | 21.05 | Township |
| Morgan township | 23 | 5,475 | 5,356 | 0.59% | 149 | 36.77 | Township |
| Oxford township | 24 | 4,649 | 4,750 | -0.21% | 188 | 24.68 | Township |
| Fairfield township | 25 | 3,671 | 3,635 | 0.36% | 92 | 39.69 | Township |
| Four Bridges | 26 | 3,659 | 3,220 | 1.36% | 1,667 | 2.19 | CDP |
| Reily township | 27 | 2,729 | 2,675 | 0.59% | 74 | 36.68 | Township |
| Monroe township | 28 | 2,726 | 2,746 | -0.22% | 75 | 36.35 | Township |
| Ross | 29 | 2,674 | 3,293 | -1.84% | 855 | 3.13 | CDP |
| Trenton township | 30 | 2,639 | 2,316 | 2.41% | 100 | 26.47 | Township |
| Monroe township | 31 | 2,322 | 2,328 | -0.13% | 97 | 23.97 | Township |
| New Miami | 32 | 2,253 | 2,215 | 0.36% | 2,492 | 0.90 | Village |
| Glendale | 33 | 2,236 | 2,303 | -0.58% | 1,362 | 1.64 | Village |
| Monroe township | 34 | 2,116 | 2,148 | -0.24% | 55 | 38.31 | Township |
| Monroe township | 35 | 2,054 | 2,087 | -0.1% | 58 | 35.12 | Township |
| Monroe township | 36 | 1,997 | 2,032 | -0.4% | 56 | 35.79 | Township |
| Monroe township | 37 | 1,991 | 2,045 | -0.3% | 55 | 36.09 | Township |
| Monroe township | 38 | 1,931 | 1,922 | 0.21% | 79 | 24.52 | Township |
| Monroe township | 39 | 1,794 | 1,801 | -0.06% | 57 | 31.27 | Township |
| Monroe township | 40 | 1,692 | 1,652 | 0.48% | 74 | 22.89 | Township |
| Monroe township | 41 | 1,638 | 1,665 | -0.3% | 64 | 25.68 | Township |
| Monroe township | 42 | 1,617 | 1,597 | 0.25% | 67 | 24.10 | Township |
| Hamilton township | 43 | 1,569 | 1,645 | -0.76% | 142 | 11.03 | Township |
| Oxford township | 44 | 1,541 | 1,502 | 0.78% | 61 | 25.23 | Township |
| Fairfield township | 45 | 1,475 | 1,517 | -0.34% | 67 | 22.06 | Township |
| Fairfield township | 46 | 1,449 | 1,442 | -0.07% | 45 | 31.92 | Township |
| Monroe township | 47 | 1,358 | 1,353 | 0.22% | 41 | 33.35 | Township |
| Monroe township | 48 | 1,308 | 1,226 | 1.4% | 32 | 40.38 | Township |
| Wetherington | 49 | 1,221 | 1,271 | -0.41% | 1,348 | 0.91 | CDP |
| Fairfield township | 50 | 1,103 | 1,124 | -0.27% | 45 | 24.55 | Township |
| Jacksonburg | 51 | 1,097 | 54 | 23.54% | 54,850 | 0.02 | Village |
| Fairfield township | 52 | 1,097 | 1,104 | 0% | 42 | 25.92 | Township |
| Oxford township | 53 | 1,087 | 950 | 2.45% | 56 | 19.41 | Township |
| Oxford township | 54 | 1,081 | 1,141 | -1.19% | 42 | 26.04 | Township |
| Monroe township | 55 | 1,070 | 1,093 | -0.28% | 29 | 36.45 | Township |
| Monroe township | 56 | 1,019 | 1,070 | -1.36% | 39 | 26.30 | Township |
| Woodsdale | 57 | 1,003 | 468 | 7.16% | 1,289 | 0.78 | CDP |
| Williamsdale | 58 | 945 | 1,029 | 2.72% | 5,431 | 0.17 | CDP |
| Ross township | 59 | 835 | 812 | 0.72% | 23 | 36.03 | Township |
| Fairfield township | 60 | 831 | 836 | 0% | 1,356 | 0.61 | Township |
| Oxford township | 61 | 770 | 772 | 0.26% | 26 | 30.14 | Township |
| Seven Mile | 62 | 728 | 717 | 0.28% | 1,007 | 0.72 | Village |
| Darrtown | 63 | 720 | 550 | 1.98% | 306 | 2.36 | CDP |
| Monroe township | 64 | 708 | 710 | 0.14% | 28 | 24.96 | Township |
| Ross township | 65 | 643 | 655 | -0.16% | 21 | 30.89 | Township |
| Millville | 66 | 635 | 634 | 0% | 1,089 | 0.58 | Village |
| Monroe township | 67 | 599 | 599 | 0% | 22 | 27.20 | Township |
| Hamilton township | 68 | 544 | 544 | 0% | 21 | 25.50 | Township |
| Monroe township | 69 | 542 | 538 | 0.37% | 22 | 24.72 | Township |
| Monroe township | 70 | 445 | 433 | 0.91% | 17 | 26.13 | Township |
| College Corner | 71 | 394 | 389 | 0.25% | 1,576 | 0.25 | Village |
| Somerville | 72 | 365 | 304 | 7.04% | 1,383 | 0.26 | CDP |
| Olde West Chester | 73 | 253 | 221 | 0.4% | 709 | 0.36 | CDP |
West Chester township is the largest city in Butler County, with a population of 66,444.
Olde West Chester is the smallest city in Butler County.
There are 73 cities in Butler County, Ohio.