County outline
Where Warren County is located
Area breakdown
Land accounts for 98.4% of Warren County’s measured area and water for 1.6%. Its combined area converts to 2,327.6 square kilometers or approximately 575,174 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 884.293 | 2,290.308 | 565,947.5 |
| Water | 14.417 | 37.34 | 9,226.9 |
| Total | 898.71 | 2,327.648 | 575,174.4 |
How Warren County compares
By original Census land area, Warren County ranks #16 of 67 in Pennsylvania and #902 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 1.354 times the Pennsylvania county-equivalent median of 653.3 square miles. It accounts for 2% of the combined county land area in the state.
See the complete Pennsylvania ranking · What counts as a county equivalent?
Population and density of Warren County
The Census Bureau estimates that 37,038 people lived in Warren County on July 1, 2025. That ranks #1,295 of 3,222 county equivalents nationally and #56 of 67 in Pennsylvania. Since the April 1, 2020 estimates base of 38,584, the population has declined by 1,546 (−4%), compared with +0.4% for Pennsylvania as a whole.
With 884.3 square miles of land, that is 42 people per square mile (16 per km²), placing Warren County #1,712 nationally for density and #59 in Pennsylvania. The median county equivalent has 47 people per square mile; the Pennsylvania median is 137. Put another way, there are about 15 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 38,513 | 38,174 | 37,824 | 37,629 | 37,311 | 37,038 |
| Change | — | −339 | −350 | −195 | −318 | −273 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Warren County
Warren County is divided into 27 municipalities and townships. In Pennsylvania, county subdivisions are local governments, and together they cover all of the county’s land and residents.
The most populous is Warren city, with 9,046 residents (24.4% of the county). The largest by land is Mead township, at 78.6 mi², or 8.9% of the county’s land.
| County subdivision | Population 2025 | Since 2020 | Land mi² | Share of county land |
|---|---|---|---|---|
| Warren cityCounty seat | 9,046 | −3.8% | 2.922 | 0.3% |
| Conewango township | 3,310 | −3.7% | 30 | 3.4% |
| Pine Grove township | 2,483 | −4% | 39.7 | 4.5% |
| Pleasant township | 2,164 | −3.9% | 33.7 | 3.8% |
| Glade township | 1,959 | −3.9% | 36 | 4.1% |
| Sheffield township | 1,755 | −5.1% | 59.2 | 6.7% |
| Brokenstraw township | 1,654 | −4.4% | 38 | 4.3% |
| Youngsville borough | 1,639 | −5.1% | 1.33 | 0.2% |
| Sugar Grove township | 1,542 | −4.5% | 35.4 | 4% |
| Columbus township | 1,540 | −4% | 40.6 | 4.6% |
| Farmington township | 1,253 | −2.2% | 34.2 | 3.9% |
| Mead township | 1,248 | −3.9% | 78.6 | 8.9% |
| Pittsfield township | 1,232 | −4% | 55.6 | 6.3% |
| Freehold township | 1,168 | −3.8% | 35.7 | 4% |
| Spring Creek township | 739 | −4.9% | 48.7 | 5.5% |
Show the other 12 subdivisions
| Name | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Tidioute borough | 599 | −4.2% | 1.073 |
| Eldred township | 567 | −3.4% | 36.2 |
| Sugar Grove borough | 527 | −4.2% | 1.121 |
| Elk township | 462 | −4% | 41 |
| Southwest township | 411 | −3.7% | 34 |
| Clarendon borough | 395 | −3.9% | 0.337 |
| Limestone township | 298 | −4.2% | 31.4 |
| Triumph township | 263 | −4.7% | 28.2 |
| Deerfield township | 257 | −4.1% | 43.2 |
| Watson township | 220 | −4.8% | 50.8 |
| Cherry Grove township | 166 | −4% | 46.3 |
| Bear Lake borough | 141 | −4.7% | 0.69 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Warren County. Land: 2026 Census Gazetteer. How communities are listed.
Metropolitan area
Warren County is a central county of the Warren, PA Micropolitan Statistical Area. Warren County is the area’s only county equivalent, so the micro area has the same 884.3 square miles of land. By combined land it ranks #223 of 542 micropolitan areas, and #365 by population.
ZIP codes
20 ZIP Code Tabulation Areas have land in Warren County; 16 of them have most of their land inside the county, and the others mainly cover neighboring areas.
1631216313163291634016345163471635016351163521635416365163711640216405164071641616420164341643616701
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Warren County
Warren County shares a land border with 7 county equivalents, including 2 in New York. It has more land than 3 of them. The largest neighbor is Cattaraugus County (1,308.2 mi²) and the smallest is Forest County (427.3 mi²). Together with its neighbors, Warren County forms a block of 7,145.4 mi² of land, of which it holds 12.4%.
| Bordering county equivalent | Land mi² | Size vs. Warren | Compare |
|---|---|---|---|
| Cattaraugus CountyNew York | 1,308.2 | 1.5× larger | Compare |
| Chautauqua CountyNew York | 1,060.4 | 1.2× larger | Compare |
| Crawford County | 1,012.4 | 1.1× larger | Compare |
| McKean County | 979.7 | 1.1× larger | Compare |
| Erie County | 799 | 1.1× smaller | Compare |
| Venango County | 674.3 | 1.3× smaller | Compare |
| Forest County | 427.3 | 2.1× smaller | Compare |
How big is Warren County compared with U.S. states?
Warren County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.2 times as much. Pennsylvania’s county land could hold about 51 areas the size of Warren County.
Another way to picture it: the same land area would fill a square about 29.7 miles (47.9 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Warren County?
Warren County has more land than 2,320 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Warren County at #982 nationally by total area, 80 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.
Its water share is 1.6%, compared with a national county-equivalent median of 1.2% — 0.4 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Warren County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #901 | Bowie County, Texas | 884.9 | Compare |
| #902 | Warren County, Pennsylvania | 884.3 | This county |
| #903 | Hall County, Texas | 883.5 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 41.834298, -79.298182. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 2,290,308,782 m²; AWATER: 37,339,451 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Warren County?
Warren County, Pennsylvania has 884.3 square miles (2,290.3 km²) of land and 14.4 square miles of water, for a total area of 898.7 square miles. It ranks #902 of 3,222 U.S. county equivalents by land area.
Is Warren County the largest county in Pennsylvania?
No. Warren County ranks #16 of 67 in Pennsylvania by land area. The largest is Lycoming County, with 1,228.9 square miles of land.
What counties border Warren County?
Warren County shares a land border with Forest County, Chautauqua County, New York, McKean County, Crawford County, Erie County, Cattaraugus County, New York, and Venango County.
What is the population of Warren County?
The Census Bureau estimates Warren County had 37,038 residents on July 1, 2025, ranking #1,295 of 3,222 county equivalents. That is 42 people per square mile of land.
What is the county seat of Warren County?
The county seat of Warren County is Warren.
What cities and towns are in Warren County?
Warren County has 27 county subdivisions (cities, towns and townships). The most populous five are Warren city, Conewango township, Pine Grove township, Pleasant township, and Glade township.
Is Warren County part of a metropolitan area?
Yes. It is a central county of the Warren, PA Micropolitan Statistical Area.
How many ZIP codes are in Warren County?
20 ZIP Code Tabulation Areas have land in Warren County, and 16 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Warren County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 1.2 times as much land.
How many acres of land are in Warren County?
The land measurement converts to approximately 565,948 acres. Including water, total area is approximately 575,174 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.