There are 38 cities in Northumberland 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 |
|---|---|---|---|---|---|---|---|
| Coal township | 1 | 10,020 | 10,123 | 2.91% | 381 | 26.3 | Township |
| Sunbury | 2 | 9,484 | 9,704 | -0.58% | 4,725 | 2.0 | City |
| Shamokin | 3 | 6,760 | 6,930 | -0.63% | 8,194 | 0.8 | City |
| Milton | 4 | 6,457 | 6,615 | -0.62% | 1,861 | 3.5 | Borough |
| Mount Carmel | 5 | 5,604 | 5,727 | -0.55% | 8,465 | 0.7 | Borough |
| Delaware township | 6 | 4,270 | 4,298 | -0.02% | 142 | 30.1 | Township |
| Ralpho township | 7 | 4,180 | 4,186 | 0.12% | 226 | 18.5 | Township |
| Danville | 8 | 4,106 | 4,241 | -0.82% | 2,641 | 1.6 | Borough |
| Northumberland | 9 | 3,816 | 3,906 | -0.6% | 2,370 | 1.6 | Borough |
| Point township | 10 | 3,778 | 3,831 | -0.37% | 151 | 25.1 | Township |
| Kulpmont | 11 | 2,685 | 2,757 | -0.67% | 2,800 | 1.0 | Borough |
| West Chillisquaque township | 12 | 2,640 | 2,602 | 0.65% | 205 | 12.9 | Township |
| Mount Carmel township | 13 | 2,441 | 2,489 | -0.37% | 113 | 21.6 | Township |
| Upper Augusta township | 14 | 2,419 | 2,472 | -0.53% | 121 | 20.0 | Township |
| Shamokin township | 15 | 2,388 | 2,372 | 0.21% | 77 | 30.8 | Township |
| Muncy | 16 | 2,384 | 2,439 | -0.58% | 2,825 | 0.8 | Borough |
| Rockefeller township | 17 | 2,305 | 2,359 | -0.6% | 112 | 20.6 | Township |
| Watsontown | 18 | 2,206 | 2,236 | -0.36% | 3,111 | 0.7 | Borough |
| Riverside | 19 | 2,004 | 2,040 | -0.45% | 406 | 4.9 | Borough |
| Lewis township | 20 | 1,919 | 1,938 | -0.36% | 73 | 26.4 | Township |
| Turbot township | 21 | 1,792 | 1,799 | 0.17% | 130 | 13.8 | Township |
| Zerbe township | 22 | 1,762 | 1,802 | -0.51% | 159 | 11.1 | Township |
| Lower Mahanoy township | 23 | 1,600 | 1,627 | -0.37% | 73 | 22.0 | Township |
| Rush township | 24 | 1,164 | 1,194 | -0.68% | 44 | 26.6 | Township |
| Lower Augusta township | 25 | 1,020 | 1,042 | -0.58% | 56 | 18.3 | Township |
| Jackson township | 26 | 882 | 899 | -0.56% | 71 | 12.5 | Township |
| Washington township | 27 | 770 | 748 | 1.58% | 43 | 18.1 | Township |
| Jordan township | 28 | 763 | 783 | -0.52% | 44 | 17.2 | Township |
| Turbotville | 29 | 659 | 677 | -0.75% | 1,461 | 0.5 | Borough |
| East Chillisquaque township | 30 | 651 | 671 | -0.91% | 81 | 8.0 | Township |
| Upper Mahanoy township | 31 | 632 | 649 | -0.94% | 27 | 23.3 | Township |
| East Cameron township | 32 | 609 | 622 | -0.49% | 52 | 11.7 | Township |
| Marion Heights | 33 | 548 | 558 | -0.54% | 3,582 | 0.2 | Borough |
| West Cameron township | 34 | 487 | 495 | 0% | 41 | 11.8 | Township |
| Little Mahanoy township | 35 | 427 | 426 | -0.47% | 39 | 10.9 | Township |
| Herndon | 36 | 342 | 350 | -0.58% | 432 | 0.8 | Borough |
| Snydertown | 37 | 320 | 328 | -0.62% | 93 | 3.4 | Borough |
| McEwensville | 38 | 288 | 290 | -0.35% | 2,462 | 0.1 | 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.
Coal township is the largest city in Northumberland County.
McEwensville is the smallest city in Northumberland County.
There are 38 cities in Northumberland County, Pennsylvania.