28 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Bloomsburg | 1 | 13,432 | 12,702 | 1.1% | 3,089 | 4 | Town |
| Berwick | 2 | 10,331 | 10,333 | -0.01% | 3,361 | 3 | Borough |
| Scott | 3 | 5,659 | 5,507 | 0.09% | 813 | 7 | Township |
| Briar Creek | 4 | 3,028 | 2,987 | 0.23% | 145 | 21 | Township |
| Berwick | 5 | 2,486 | 2,399 | 0.73% | 323 | 8 | Township |
| Hemlock | 6 | 2,342 | 2,213 | 2.05% | 133 | 18 | Township |
| North Centre | 7 | 2,114 | 2,036 | 0.38% | 141 | 15 | Township |
| South Centre | 8 | 1,931 | 1,903 | 0.31% | 355 | 5 | Township |
| Greenwood | 9 | 1,916 | 1,882 | 0.63% | 68 | 28 | Township |
| Benton | 10 | 1,756 | 1,718 | 0.8% | 73 | 24 | Township |
| Fishing Creek | 11 | 1,584 | 1,522 | 0.96% | 56 | 28 | Township |
| Catawissa | 12 | 1,536 | 1,538 | -0.07% | 2,994 | 1 | Borough |
| Locust | 13 | 1,476 | 1,453 | 0.41% | 83 | 18 | Township |
| Benton | 14 | 1,369 | 1,316 | 0.81% | 70 | 20 | Township |
| Main | 15 | 1,288 | 1,267 | 0.31% | 80 | 16 | Township |
| Montour | 16 | 1,265 | 1,256 | 0.16% | 138 | 9 | Township |
| Orange | 17 | 1,179 | 1,161 | 0.17% | 92 | 13 | Township |
| Cleveland | 18 | 1,157 | 1,129 | 0.7% | 50 | 23 | Township |
| Pine | 19 | 1,033 | 1,012 | 0.98% | 39 | 26 | Township |
| Millville | 20 | 985 | 974 | 0.2% | 1,004 | 1 | Borough |
| Catawissa | 21 | 912 | 902 | 0.11% | 74 | 12 | Township |
| Benton | 22 | 824 | 821 | 0% | 1,380 | 1 | Borough |
| Briar Creek | 23 | 602 | 597 | 0.17% | 365 | 2 | Borough |
| Roaring Creek | 24 | 561 | 554 | 0.18% | 24 | 23 | Township |
| Orangeville | 25 | 476 | 476 | 0% | 1,070 | 0 | Borough |
| New Columbus | 26 | 225 | 219 | 0.45% | 73 | 3 | Borough |
| Stillwater | 27 | 199 | 199 | 0% | 64 | 3 | Borough |
| Centralia | 28 | 4 | 4 | 0% | 17 | 0 | Borough |
Bloomsburg is the largest city in Columbia County, with a population of 13,432.
Centralia is the smallest city in Columbia County, with a population of 4.
There are 28 cities in Columbia County, Pennsylvania.