25 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Selinsgrove | 1 | 5,462 | 5,712 | -0.91% | 2,985 | 1.83 | Borough |
| Monroe township | 2 | 4,280 | 4,149 | 1.11% | 275 | 15.54 | Township |
| Center township | 3 | 2,443 | 2,415 | 0.29% | 116 | 20.98 | Township |
| Middlecreek township | 4 | 2,071 | 2,056 | 0.39% | 144 | 14.38 | Township |
| Perry township | 5 | 2,063 | 2,064 | 0.24% | 78 | 26.30 | Township |
| Spring township | 6 | 1,644 | 1,637 | 0.37% | 44 | 37.06 | Township |
| Shamokin Dam | 7 | 1,632 | 1,649 | -0.18% | 885 | 1.84 | Borough |
| Chapman township | 8 | 1,597 | 1,565 | 0.44% | 118 | 13.54 | Township |
| Union township | 9 | 1,537 | 1,500 | 0.65% | 105 | 14.65 | Township |
| Middleburg | 10 | 1,313 | 1,325 | -0.15% | 1,487 | 0.88 | Borough |
| West Beaver township | 11 | 1,151 | 1,129 | 0.7% | 42 | 27.48 | Township |
| West Perry township | 12 | 1,086 | 1,084 | 0.28% | 40 | 26.98 | Township |
| Beavertown | 13 | 989 | 999 | -0.2% | 1,289 | 0.77 | Borough |
| Adams township | 14 | 911 | 897 | 0.55% | 45 | 20.18 | Township |
| Penns Creek | 15 | 814 | 507 | 0.87% | 1,109 | 0.73 | CDP |
| Beaver Springs | 16 | 744 | 779 | 0.68% | 549 | 1.35 | CDP |
| Port Trevorton | 17 | 594 | 754 | -1.98% | 176 | 3.38 | CDP |
| Freeburg | 18 | 557 | 559 | 0% | 1,746 | 0.32 | Borough |
| Hummels Wharf | 19 | 479 | 939 | -10.97% | 608 | 0.79 | CDP |
| Troxelville | 20 | 475 | 418 | 3.71% | 463 | 1.03 | CDP |
| Kreamer | 21 | 464 | 655 | -4.92% | 374 | 1.24 | CDP |
| Kratzerville | 22 | 304 | 336 | -1.94% | 324 | 0.94 | CDP |
| Mount Pleasant Mills | 23 | 242 | 286 | -5.47% | 151 | 1.60 | CDP |
| Paxtonville | 24 | 181 | 314 | -3.21% | 207 | 0.87 | CDP |
| Beavertown | 25 | 29 | 39 | 7.41% | 460 | 0.06 | CDP |
Selinsgrove is the largest city in Snyder County, with a population of 5,462.
Beavertown is the smallest city in Snyder County.
There are 25 cities in Snyder County, Pennsylvania.