Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Pop. | 2020 Pop. | Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hamilton | 1 | 62,859 | 63,409 | -0.22% | 2,930 | 21.4 | City |
| Middletown | 2 | 51,629 | 51,025 | 0.29% | 1,972 | 26.2 | City |
| Fairfield | 3 | 44,294 | 44,905 | -0.34% | 2,126 | 20.8 | City |
| Oxford | 4 | 22,104 | 23,047 | -1.06% | 2,843 | 7.8 | City |
| Monroe | 5 | 15,646 | 15,460 | 0.29% | 991 | 15.8 | City |
| Trenton | 6 | 13,986 | 13,072 | 1.66% | 2,832 | 4.9 | City |
| Sharonville | 7 | 13,810 | 14,097 | -0.52% | 1,408 | 9.8 | City |
| Beckett Ridge | 8 | 9,996 | 9,493 | 0.58% | 2,082 | 4.8 | CDP |
| Four Bridges | 9 | 3,610 | 3,220 | 1.4% | 1,645 | 2.2 | CDP |
| Ross | 10 | 2,724 | 3,293 | -1.8% | 871 | 3.1 | CDP |
| Glendale | 11 | 2,249 | 2,303 | -0.62% | 1,370 | 1.6 | Village |
| New Miami | 12 | 2,245 | 2,215 | 0.31% | 2,483 | 0.9 | Village |
| Wetherington | 13 | 1,226 | 1,271 | -0.49% | 1,353 | 0.9 | CDP |
| Woodsdale | 14 | 936 | 468 | 7.71% | 1,203 | 0.8 | CDP |
| Williamsdale | 15 | 920 | 1,029 | 2.68% | 5,287 | 0.2 | CDP |
| Jacksonburg | 16 | 888 | 54 | 30.59% | 44,400 | 0.0 | Village |
| Seven Mile | 17 | 726 | 717 | 0.28% | 1,004 | 0.7 | Village |
| Darrtown | 18 | 706 | 550 | 1.88% | 300 | 2.4 | CDP |
| Millville | 19 | 635 | 634 | 0% | 1,089 | 0.6 | Village |
| College Corner | 20 | 393 | 389 | 0.26% | 1,572 | 0.3 | Village |
| Somerville | 21 | 341 | 304 | 7.91% | 1,292 | 0.3 | CDP |
| Olde West Chester | 22 | 252 | 221 | 0.4% | 706 | 0.4 | CDP |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Hamilton is the largest city in Butler County.
Olde West Chester is the smallest city in Butler County.
There are 22 cities in Butler County, Ohio.