Columbia County, Pennsylvania
County seat: Bloomsburg · Population 66,193 (2025) · 483 sq mi
Columbia County is the 38th most populous of Pennsylvania's 67 counties, with 66,193 people (2025 estimate). Its county seat is Bloomsburg. It is part of the District 3 region, one of the 11 PennDOT engineering districts. The map shows its 10 cities and towns and the 6 neighboring counties.
Columbia County facts
- County seat
- Bloomsburg
- Population (2025 estimate)
- 66,193 +2.3% since 2020
- Land area
- 483 sq mi 46th largest of 67
- Water area
- 7 sq mi
- Population density
- 137 per sq mi
- Established
- 1813
- Same name
- One of 8 Columbia Counties in the US
- Named after
- Christopher Columbus Italian navigator, explorer, and colonist (1451–1506)
- Largest city
- Bloomsburg 13,375
- Median household income
- $64,644
- Cities and towns
- 10 plus 24 CDPs
- ZIP codes
- 20
- Time zone
- Eastern
- FIPS code
- 42037
Cities and towns in Columbia County
Columbia County has 10 incorporated cities, towns and villages. Populations count the people living inside Columbia County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Bloomsburg (county seat) | Town | 13,375 | |
| Berwick | Borough | 10,297 | |
| Catawissa | Borough | 1,539 | |
| Millville | Borough | 980 | |
| Benton | Borough | 819 | |
| Briar Creek | Borough | 608 | |
| Orangeville | Borough | 476 | |
| Stillwater | Borough | 199 | |
| Centralia | Borough | 4 | |
| Ashland | Borough | 0 | Schuylkill County |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| Espy | 1,624 | |
| Almedia | 1,271 | |
| Mifflinville | 1,193 | |
| Lightstreet | 1,156 | |
| Lime Ridge | 842 | |
| Buckhorn | 646 | |
| Fernville | 456 | |
| Wilburton Number One | 413 | |
| Foundryville | 360 | |
| Numidia | 307 | |
| Jamison City | 260 | |
| Aristes | 246 | |
| Iola | 179 | |
| Rupert | 164 | |
| Jerseytown | 154 | |
| Rohrsburg | 127 | |
| Eyers Grove | 125 | |
| Locustdale | 123 | Schuylkill County |
| Mainville | 115 | |
| Waller | 72 | |
| Slabtown | 62 | |
| Jonestown | 36 | |
| Wilburton Number Two | 33 | |
| Elk Grove | 13 | Sullivan County |
ZIP codes in Columbia County
20 ZIP codes reach into Columbia County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 17756 also Lycoming, Northumberland and Montour counties
- 17774 also Lycoming County
- 17814 also Sullivan, Luzerne and Lycoming counties
- 17815 also Luzerne and Montour counties
- 17820 also Montour County
- 17821 also Montour and Northumberland counties
- 17824 also Northumberland and Montour counties
- 17846 also Lycoming County
- 17858
- 17859
- 17878 also Luzerne County
- 17888
- 17920
- 17921 also Schuylkill County
- 17945 also Schuylkill County
- 17985 also Schuylkill County
- 18603 also Luzerne County
- 18631
- 18635 also Luzerne County
- 18655 also Luzerne County
Population of Columbia County, 2020–2025
Columbia County grew by 1,473 people (+2.3%) between April 2020 and July 2025: 1,336 more deaths than births and a net gain of 2,766 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 64,681 |
| 2021 | 64,981 |
| 2022 | 65,358 |
| 2023 | 65,768 |
| 2024 | 65,997 |
| 2025 | 66,193 |
Neighboring counties
- Luzerne County east · 332,126 people
- Montour County west · 17,868 people
- Schuylkill County south · 145,085 people
- Northumberland County southwest · 89,920 people
- Lycoming County northwest · 112,587 people
- Sullivan County north · 5,856 people
Printable Columbia County map
The PDF is a vector file with real text: it prints sharp on Letter paper and you can search it for a town. The PNG is 2400 pixels wide for slides and documents. Both are free to use with a credit to WhichCounty.
- PDF (Letter) (102 KB)
- PNG (2400 px) (102 KB)
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Sources
- Boundaries: U.S. Census Bureau, 2025 Cartographic Boundary Files (1:500,000).
- Population: Census Bureau county and city estimates, Vintage 2025. CDP populations: American Community Survey 2020–2024.
- Places and ZIP codes: Census Bureau 2026 Gazetteer and 2020 ZIP Code Tabulation Area relationship files.
- County seat, founding year and name origin: Wikidata (CC0), checked against state sources.
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