Warren County, Pennsylvania
County seat: Warren · Population 37,038 (2025) · 884 sq mi
Warren County is the 56th most populous of Pennsylvania's 67 counties, with 37,038 people (2025 estimate). Its county seat is Warren. It is part of the District 1 region, one of the 11 PennDOT engineering districts. The map shows its 6 cities and towns and the 8 neighboring counties.
Warren County facts
- County seat
- Warren
- Population (2025 estimate)
- 37,038 −4% since 2020
- Land area
- 884 sq mi 16th largest of 67
- Water area
- 14 sq mi
- Population density
- 42 per sq mi
- Established
- 1800
- Same name
- One of 14 Warren Counties in the US
- Named after
- Joseph Warren American doctor (1741-1775)
- Largest city
- Warren 9,046
- Median household income
- $60,480
- Cities and towns
- 6 plus 5 CDPs
- ZIP codes
- 20
- Time zone
- Eastern
- FIPS code
- 42123
Cities and towns in Warren County
Warren County has 6 incorporated cities, towns and villages. Populations count the people living inside Warren County; cities that cross a county line also list the other counties.
| Name | Type | Population 2025 | Also in |
|---|---|---|---|
| Warren (county seat) | City | 9,046 | |
| Youngsville | Borough | 1,639 | |
| Tidioute | Borough | 599 | |
| Sugar Grove | Borough | 527 | |
| Clarendon | Borough | 395 | |
| Bear Lake | Borough | 141 |
Unincorporated communities (CDPs)
Census-designated places are communities without their own city government; the county provides their services.
| Community | Population | Also in |
|---|---|---|
| North Warren | 2,104 | |
| Russell | 1,215 | |
| Sheffield | 833 | |
| Columbus | 664 | |
| Starbrick | 493 |
ZIP codes in Warren County
20 ZIP codes reach into Warren County. ZIP codes ignore county lines, so some also cover a neighboring county.
- 16312
- 16313
- 16329
- 16340
- 16345
- 16347 also Forest County
- 16350
- 16351 also Forest County
- 16352
- 16354 also Venango and Crawford counties
- 16365
- 16371
- 16402
- 16405
- 16407 also Erie and Crawford counties
- 16416
- 16420
- 16434 also Crawford County
- 16436
- 16701 also McKean County
Population of Warren County, 2020–2025
Warren County shrank by 1,546 people (−4%) between April 2020 and July 2025: 1,304 more deaths than births and a net loss of 224 people from migration.
| Year (July 1) | Population |
|---|---|
| 2020 | 38,513 |
| 2021 | 38,174 |
| 2022 | 37,824 |
| 2023 | 37,629 |
| 2024 | 37,311 |
| 2025 | 37,038 |
Neighboring counties
- Forest County south · 6,614 people
- Chautauqua County, New York north · 124,126 people
- McKean County east · 38,984 people
- Crawford County west · 81,792 people
- Erie County northwest · 265,832 people
- Cattaraugus County, New York northeast · 75,390 people
- Venango County southwest · 49,346 people
- Elk County southeast · 29,926 people
Printable Warren 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) (95 KB)
- PNG (2400 px) (68 KB)
Paste this code to embed the map on your site:
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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