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 |
|---|---|---|---|---|---|---|---|
| Center township | 1 | 11,781 | 11,645 | 0.47% | 774 | 15.2 | Township |
| Aliquippa | 2 | 8,956 | 9,218 | -0.73% | 2,135 | 4.2 | City |
| Brighton township | 3 | 8,761 | 8,774 | 0.02% | 452 | 19.4 | Township |
| Beaver Falls | 4 | 8,709 | 8,980 | -0.78% | 4,079 | 2.1 | City |
| Chippewa township | 5 | 8,100 | 8,034 | 0.87% | 516 | 15.7 | Township |
| New Sewickley township | 6 | 7,011 | 7,150 | -0.27% | 214 | 32.7 | Township |
| Ambridge | 7 | 6,849 | 6,952 | -0.38% | 4,606 | 1.5 | Borough |
| New Brighton | 8 | 5,498 | 5,642 | -0.65% | 5,328 | 1.0 | Borough |
| Monaca | 9 | 5,446 | 5,610 | -0.75% | 2,687 | 2.0 | Borough |
| North Sewickley township | 10 | 5,426 | 5,486 | -0.11% | 261 | 20.8 | Township |
| Beaver | 11 | 4,327 | 4,426 | -0.57% | 4,724 | 0.9 | Borough |
| Baden | 12 | 3,781 | 3,891 | -0.73% | 1,672 | 2.3 | Borough |
| Clinton township | 13 | 3,585 | 3,718 | -0.14% | 131 | 27.4 | Township |
| Rochester | 14 | 3,368 | 3,467 | -0.74% | 5,728 | 0.6 | Borough |
| Ohioville | 15 | 3,285 | 3,344 | -0.46% | 141 | 23.3 | Borough |
| Patterson township | 16 | 3,050 | 3,121 | -0.36% | 1,844 | 1.7 | Township |
| Daugherty township | 17 | 2,999 | 3,073 | -0.33% | 303 | 9.9 | Township |
| Freedom township | 18 | 2,938 | 3,004 | -0.44% | 169 | 17.4 | Township |
| Clinton township | 19 | 2,886 | 2,915 | 0.14% | 122 | 23.6 | Township |
| Raccoon township | 20 | 2,738 | 2,784 | -0.15% | 146 | 18.7 | Township |
| Rochester township | 21 | 2,712 | 2,777 | -0.33% | 698 | 3.9 | Township |
| South Beaver township | 22 | 2,641 | 2,674 | 0.19% | 89 | 29.7 | Township |
| Midland | 23 | 2,356 | 2,427 | -0.76% | 1,302 | 1.8 | Borough |
| Greene township | 24 | 2,249 | 2,184 | 1.17% | 90 | 25.0 | Township |
| Independence township | 25 | 2,211 | 2,242 | -0.09% | 95 | 23.2 | Township |
| Conway | 26 | 2,124 | 2,167 | -0.52% | 1,665 | 1.3 | Borough |
| Clinton township | 27 | 2,061 | 2,040 | 0.05% | 54 | 38.3 | Township |
| Big Beaver | 28 | 1,826 | 1,868 | -0.6% | 103 | 17.8 | Borough |
| Industry | 29 | 1,777 | 1,828 | -0.73% | 175 | 10.1 | Borough |
| Beaver township | 30 | 1,770 | 1,826 | -0.9% | 53 | 33.4 | Township |
| Darlington township | 31 | 1,765 | 1,808 | -0.28% | 80 | 22.0 | Township |
| Freedom | 32 | 1,454 | 1,494 | -0.68% | 2,407 | 0.6 | Borough |
| New Beaver | 33 | 1,334 | 1,369 | -0.67% | 92 | 14.4 | Borough |
| Clinton township | 34 | 1,296 | 1,325 | -0.84% | 105 | 12.3 | Township |
| Vanport township | 35 | 1,269 | 1,291 | 0% | 1,387 | 0.9 | Township |
| West Mayfield | 36 | 1,159 | 1,194 | -0.77% | 1,458 | 0.8 | Borough |
| Ellport | 37 | 1,094 | 1,081 | 0.27% | 2,550 | 0.4 | Borough |
| Bridgewater | 38 | 728 | 743 | -0.55% | 1,169 | 0.6 | Borough |
| Koppel | 39 | 692 | 708 | -0.57% | 1,289 | 0.5 | Borough |
| Patterson Heights | 40 | 616 | 636 | -0.8% | 2,738 | 0.2 | Borough |
| East Rochester | 41 | 548 | 564 | -0.73% | 1,497 | 0.4 | Borough |
| South Heights | 42 | 374 | 385 | -0.8% | 1,144 | 0.3 | Borough |
| New Galilee | 43 | 315 | 326 | -0.94% | 1,137 | 0.3 | Borough |
| Fallston | 44 | 248 | 255 | -0.8% | 523 | 0.5 | Borough |
| Darlington | 45 | 244 | 247 | -0.41% | 2,976 | 0.1 | Borough |
| Georgetown | 46 | 201 | 207 | -0.98% | 1,149 | 0.2 | Borough |
| Eastvale | 47 | 175 | 182 | -1.13% | 1,944 | 0.1 | Borough |
| Shippingport | 48 | 152 | 159 | -1.3% | 44 | 3.4 | Borough |
| Hookstown | 49 | 128 | 132 | -0.78% | 948 | 0.1 | Borough |
| Frankfort Springs | 50 | 114 | 118 | -0.87% | 438 | 0.3 | Borough |
| Homewood | 51 | 88 | 91 | -1.12% | 521 | 0.2 | Borough |
| S.N.P.J. | 52 | 17 | 17 | 0% | 23 | 0.7 | Borough |
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.
Center township is the largest city in Beaver County.
S.N.P.J. is the smallest city in Beaver County.
There are 52 cities in Beaver County, Pennsylvania.