21 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Penn Forest township | 1 | 10,365 | 9,938 | 0.63% | 140 | 73.79 | Township |
| Palmerton | 2 | 5,630 | 5,595 | 0.12% | 2,266 | 2.48 | Borough |
| Lehighton | 3 | 5,262 | 5,247 | 0.06% | 3,242 | 1.62 | Borough |
| Towamensing township | 4 | 4,580 | 4,435 | 0.48% | 169 | 27.14 | Township |
| Jim Thorpe | 5 | 4,546 | 4,503 | 0.2% | 311 | 14.60 | Borough |
| Mahoning township | 6 | 4,301 | 4,257 | -0.07% | 182 | 23.66 | Township |
| Lansford | 7 | 4,149 | 4,139 | 0.05% | 2,701 | 1.54 | Borough |
| Nesquehoning | 8 | 3,348 | 3,338 | 0.06% | 158 | 21.16 | Borough |
| Summit Hill | 9 | 3,143 | 3,120 | 0.16% | 362 | 8.69 | Borough |
| Lower Towamensing township | 10 | 3,077 | 3,043 | -0.07% | 145 | 21.25 | Township |
| East Penn township | 11 | 2,755 | 2,748 | -0.36% | 121 | 22.71 | Township |
| Weatherly | 12 | 2,554 | 2,546 | 0.08% | 857 | 2.98 | Borough |
| Kidder township | 13 | 1,861 | 1,791 | 0.65% | 27 | 68.94 | Township |
| Banks township | 14 | 1,156 | 1,163 | -0.34% | 99 | 11.63 | Township |
| Packer township | 15 | 1,024 | 1,026 | -0.19% | 37 | 27.93 | Township |
| Bowmanstown | 16 | 899 | 889 | 0.22% | 1,169 | 0.77 | Borough |
| Beaver Meadows | 17 | 896 | 896 | 0% | 3,473 | 0.26 | Borough |
| Parryville | 18 | 415 | 414 | 0% | 258 | 1.61 | Borough |
| Weissport | 19 | 412 | 411 | 0% | 3,052 | 0.14 | Borough |
| Penn Lake Park | 20 | 379 | 358 | 1.07% | 239 | 1.58 | Borough |
| East Side | 21 | 250 | 249 | 0% | 217 | 1.15 | Borough |
Penn Forest township is the largest city in Carbon County, with a population of 10,365.
East Side is the smallest city in Carbon County.
There are 21 cities in Carbon County, Pennsylvania.