There are 76 cities in Washington County, Pennsylvania.
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 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bethel Park | 1 | 32,025 | 33,515 | -1.15% | 2,737 | 11.7 | Township |
| Peters township | 2 | 23,268 | 22,958 | 0.02% | 1,193 | 19.5 | Township |
| North Strabane township | 3 | 17,142 | 15,690 | 2.53% | 629 | 27.3 | Township |
| Cecil township | 4 | 15,201 | 14,651 | 0.9% | 577 | 26.4 | Township |
| Washington | 5 | 13,518 | 13,162 | 0.66% | 4,615 | 2.9 | City |
| Jefferson Hills | 6 | 12,095 | 12,427 | -0.68% | 729 | 16.6 | Borough |
| Canonsburg | 7 | 9,589 | 9,748 | -0.41% | 4,151 | 2.3 | Borough |
| South Strabane township | 8 | 9,580 | 9,640 | -0.33% | 417 | 23.0 | Township |
| Chartiers township | 9 | 9,195 | 8,679 | 0.29% | 374 | 24.6 | Township |
| Canton township | 10 | 8,252 | 8,212 | -0.21% | 556 | 14.9 | Township |
| Union township | 11 | 5,471 | 5,384 | 1.02% | 358 | 15.3 | Township |
| Carroll township | 12 | 5,296 | 5,380 | -0.36% | 393 | 13.5 | Township |
| North Franklin township | 13 | 4,750 | 4,824 | -0.36% | 648 | 7.3 | Township |
| Bridgeville | 14 | 4,565 | 4,793 | -1.23% | 4,169 | 1.1 | Borough |
| Donora | 15 | 4,479 | 4,561 | -0.47% | 2,359 | 1.9 | Borough |
| California | 16 | 4,398 | 5,361 | -5.2% | 399 | 11.0 | Borough |
| Smith township | 17 | 4,183 | 4,233 | -0.36% | 121 | 34.5 | Township |
| Charleroi | 18 | 4,153 | 4,235 | -0.5% | 5,450 | 0.8 | Borough |
| Monongahela | 19 | 4,067 | 4,147 | -0.49% | 2,126 | 1.9 | City |
| Fallowfield township | 20 | 4,021 | 4,100 | -0.42% | 189 | 21.3 | Township |
| Amwell township | 21 | 3,646 | 3,682 | -0.3% | 81 | 44.8 | Township |
| Waynesburg | 22 | 3,640 | 3,991 | -2.36% | 4,522 | 0.8 | Borough |
| Mount Pleasant township | 23 | 3,353 | 3,293 | 0.54% | 94 | 35.6 | Township |
| Centerville | 24 | 3,210 | 3,258 | -0.37% | 243 | 13.2 | Borough |
| Nottingham township | 25 | 2,989 | 2,936 | 1.15% | 147 | 20.3 | Township |
| South Franklin township | 26 | 2,828 | 2,871 | -0.35% | 137 | 20.6 | Township |
| Somerset township | 27 | 2,576 | 2,590 | 0% | 80 | 32.1 | Township |
| Hanover township | 28 | 2,390 | 2,420 | -0.38% | 50 | 47.6 | Township |
| Donegal township | 29 | 2,374 | 2,396 | -0.08% | 57 | 41.5 | Township |
| Bentleyville | 30 | 2,323 | 2,355 | -0.34% | 629 | 3.7 | Borough |
| East Bethlehem township | 31 | 2,278 | 2,312 | -0.35% | 450 | 5.1 | Township |
| Brownsville | 32 | 2,076 | 2,179 | -1.24% | 2,125 | 1.0 | Borough |
| New Eagle | 33 | 2,013 | 2,057 | -0.54% | 1,981 | 1.0 | Borough |
| McDonald | 34 | 2,005 | 2,053 | -0.6% | 3,871 | 0.5 | Borough |
| Buffalo township | 35 | 1,952 | 1,983 | -0.26% | 96 | 20.4 | Township |
| North Belle Vernon | 36 | 1,819 | 1,871 | -0.71% | 4,331 | 0.4 | Borough |
| East Washington | 37 | 1,817 | 1,851 | -0.49% | 4,047 | 0.4 | Borough |
| Robinson township | 38 | 1,678 | 1,706 | -0.36% | 79 | 21.2 | Township |
| North Bethlehem township | 39 | 1,527 | 1,551 | -0.39% | 69 | 22.1 | Township |
| West Pike Run township | 40 | 1,515 | 1,543 | -0.39% | 93 | 16.3 | Township |
| Independence township | 41 | 1,494 | 1,510 | -0.2% | 58 | 25.8 | Township |
| Burgettstown | 42 | 1,395 | 1,425 | -0.57% | 2,243 | 0.6 | Borough |
| Cross Creek township | 43 | 1,370 | 1,373 | 0.29% | 50 | 27.5 | Township |
| East Finley township | 44 | 1,278 | 1,288 | 0.16% | 36 | 35.1 | Township |
| North Charleroi | 45 | 1,275 | 1,302 | -0.55% | 4,961 | 0.3 | Borough |
| West Bethlehem township | 46 | 1,267 | 1,291 | -0.55% | 57 | 22.4 | Township |
| Houston | 47 | 1,146 | 1,169 | -0.52% | 2,788 | 0.4 | Borough |
| Jefferson township | 48 | 1,114 | 1,120 | -0.18% | 49 | 22.6 | Township |
| Speers | 49 | 1,065 | 1,084 | -0.47% | 1,120 | 1.0 | Borough |
| Belle Vernon | 50 | 979 | 1,027 | -1.21% | 3,751 | 0.3 | Borough |
| West Brownsville | 51 | 969 | 976 | -0.21% | 746 | 1.3 | Borough |
| Ellsworth | 52 | 920 | 940 | -0.54% | 1,245 | 0.7 | Borough |
| Midway | 53 | 912 | 923 | -0.33% | 2,073 | 0.4 | Borough |
| Morris township | 54 | 910 | 908 | 0.11% | 32 | 28.4 | Township |
| Hopewell township | 55 | 867 | 854 | 0.23% | 42 | 20.6 | Township |
| West Finley township | 56 | 844 | 813 | 1.81% | 22 | 39.1 | Township |
| Deemston | 57 | 739 | 753 | -0.54% | 77 | 9.6 | Borough |
| Claysville | 58 | 715 | 729 | -0.56% | 2,314 | 0.3 | Borough |
| Roscoe | 59 | 703 | 719 | -0.57% | 3,863 | 0.2 | Borough |
| Cokeburg | 60 | 614 | 626 | -0.49% | 1,744 | 0.4 | Borough |
| Blaine township | 61 | 613 | 620 | -0.49% | 52 | 11.9 | Township |
| Fayette City | 62 | 479 | 502 | -1.24% | 2,158 | 0.2 | Borough |
| Allenport | 63 | 475 | 485 | -0.63% | 223 | 2.1 | Borough |
| Stockdale | 64 | 416 | 424 | -0.48% | 1,612 | 0.3 | Borough |
| Long Branch | 65 | 412 | 420 | -0.48% | 129 | 3.2 | Borough |
| Beallsville | 66 | 386 | 393 | -0.52% | 159 | 2.4 | Borough |
| Marianna | 67 | 386 | 396 | -0.77% | 197 | 2.0 | Borough |
| Finleyville | 68 | 369 | 376 | -0.54% | 2,210 | 0.2 | Borough |
| Dunlevy | 69 | 362 | 369 | -0.55% | 680 | 0.5 | Borough |
| Elco | 70 | 258 | 264 | -0.77% | 925 | 0.3 | Borough |
| Twilight | 71 | 212 | 216 | -0.47% | 132 | 1.6 | Borough |
| Clarksville | 72 | 183 | 194 | -1.61% | 1,887 | 0.1 | Borough |
| Frankfort Springs | 73 | 114 | 118 | -0.87% | 438 | 0.3 | Borough |
| Coal Center | 74 | 110 | 110 | 0% | 965 | 0.1 | Borough |
| West Middletown | 75 | 109 | 109 | 0% | 268 | 0.4 | Borough |
| Green Hills | 76 | 20 | 20 | 0% | 22 | 0.9 | 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.
Bethel Park is the largest city in Washington County.
Green Hills is the smallest city in Washington County.
There are 76 cities in Washington County, Pennsylvania.