52 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Center township | 1 | 11,836 | 11,645 | 0.47% | 777 | 15.23 | Township |
| Aliquippa | 2 | 8,891 | 9,218 | -0.73% | 2,120 | 4.19 | City |
| Brighton township | 3 | 8,763 | 8,774 | 0.02% | 452 | 19.39 | Township |
| Beaver Falls | 4 | 8,641 | 8,980 | -0.78% | 4,047 | 2.13 | City |
| Chippewa township | 5 | 8,170 | 8,034 | 0.86% | 521 | 15.69 | Township |
| New Sewickley township | 6 | 6,992 | 7,150 | -0.27% | 214 | 32.69 | Township |
| Ambridge | 7 | 6,823 | 6,952 | -0.38% | 4,588 | 1.49 | Borough |
| New Brighton | 8 | 5,462 | 5,642 | -0.66% | 5,293 | 1.03 | Borough |
| North Sewickley township | 9 | 5,420 | 5,486 | -0.11% | 261 | 20.77 | Township |
| Monaca | 10 | 5,405 | 5,610 | -0.75% | 2,667 | 2.03 | Borough |
| Beaver | 11 | 4,302 | 4,426 | -0.58% | 4,697 | 0.92 | Borough |
| Baden | 12 | 3,754 | 3,891 | -0.71% | 1,660 | 2.26 | Borough |
| Clinton township | 13 | 3,580 | 3,718 | -0.14% | 131 | 27.42 | Township |
| Rochester | 14 | 3,343 | 3,467 | -0.74% | 5,685 | 0.59 | Borough |
| Ohioville | 15 | 3,270 | 3,344 | -0.46% | 140 | 23.34 | Borough |
| Patterson township | 16 | 3,039 | 3,121 | -0.36% | 1,837 | 1.65 | Township |
| Daugherty township | 17 | 2,989 | 3,073 | -0.33% | 302 | 9.89 | Township |
| Freedom township | 18 | 2,925 | 3,004 | -0.44% | 168 | 17.37 | Township |
| Clinton township | 19 | 2,890 | 2,915 | 0.14% | 123 | 23.57 | Township |
| Raccoon township | 20 | 2,734 | 2,784 | -0.15% | 146 | 18.72 | Township |
| Rochester township | 21 | 2,703 | 2,777 | -0.33% | 696 | 3.88 | Township |
| South Beaver township | 22 | 2,646 | 2,674 | 0.19% | 89 | 29.69 | Township |
| Midland | 23 | 2,338 | 2,427 | -0.76% | 1,292 | 1.81 | Borough |
| Greene township | 24 | 2,275 | 2,184 | 1.16% | 91 | 25.02 | Township |
| Independence township | 25 | 2,209 | 2,242 | -0.09% | 95 | 23.17 | Township |
| Conway | 26 | 2,113 | 2,167 | -0.52% | 1,656 | 1.28 | Borough |
| Clinton township | 27 | 2,062 | 2,040 | 0.05% | 54 | 38.26 | Township |
| Big Beaver | 28 | 1,816 | 1,868 | -0.55% | 102 | 17.79 | Borough |
| Industry | 29 | 1,764 | 1,828 | -0.73% | 174 | 10.13 | Borough |
| Darlington township | 30 | 1,760 | 1,808 | -0.28% | 80 | 21.97 | Township |
| Beaver township | 31 | 1,754 | 1,826 | -0.9% | 52 | 33.42 | Township |
| Freedom | 32 | 1,444 | 1,494 | -0.69% | 2,391 | 0.60 | Borough |
| New Beaver | 33 | 1,325 | 1,369 | -0.68% | 92 | 14.45 | Borough |
| Clinton township | 34 | 1,285 | 1,325 | -0.85% | 104 | 12.34 | Township |
| Vanport township | 35 | 1,269 | 1,291 | 0% | 1,387 | 0.92 | Township |
| West Mayfield | 36 | 1,150 | 1,194 | -0.78% | 1,447 | 0.80 | Borough |
| Ellport | 37 | 1,097 | 1,081 | 0.27% | 2,557 | 0.43 | Borough |
| Bridgewater | 38 | 724 | 743 | -0.55% | 1,162 | 0.62 | Borough |
| Koppel | 39 | 688 | 708 | -0.58% | 1,281 | 0.54 | Borough |
| Patterson Heights | 40 | 611 | 636 | -0.81% | 2,716 | 0.23 | Borough |
| East Rochester | 41 | 544 | 564 | -0.73% | 1,486 | 0.37 | Borough |
| South Heights | 42 | 371 | 385 | -0.8% | 1,135 | 0.33 | Borough |
| New Galilee | 43 | 312 | 326 | -0.95% | 1,126 | 0.28 | Borough |
| Fallston | 44 | 246 | 255 | -0.81% | 519 | 0.47 | Borough |
| Darlington | 45 | 243 | 247 | -0.41% | 2,963 | 0.08 | Borough |
| Georgetown | 46 | 200 | 207 | -0.5% | 1,143 | 0.17 | Borough |
| Eastvale | 47 | 173 | 182 | -1.14% | 1,922 | 0.09 | Borough |
| Shippingport | 48 | 150 | 159 | -1.32% | 44 | 3.44 | Borough |
| Hookstown | 49 | 127 | 132 | -0.78% | 941 | 0.14 | Borough |
| Frankfort Springs | 50 | 113 | 118 | -0.88% | 435 | 0.26 | Borough |
| Homewood | 51 | 87 | 91 | -1.14% | 515 | 0.17 | Borough |
| S.N.P.J. | 52 | 17 | 17 | 0% | 23 | 0.75 | Borough |
Center township is the largest city in Beaver County, with a population of 11,836.
S.N.P.J. is the smallest city in Beaver County.
There are 52 cities in Beaver County, Pennsylvania.