County Maps US

Clarion County, Pennsylvania

A county in Pennsylvania, ranked 57 of 67 by population.

CountyFIPS 42031

Within Pennsylvania
Clarion County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Clarion, the county seat, located via the 2025 Census Gazetteer.

Download SVGFull Pennsylvania map downloads

Population
36,680
-520 (-1.4%) since 2020
Land area
600.8
square miles. A further 1.5% of the total area is water
Population density
61.0
people per square mile, computed rather than published
County seat
Clarion
Seat of county government.
Established
1839
186 years ago
Largest city
Clarion borough
Population 4,037.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Clarion County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Clarion County, Pennsylvania from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 653 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Clarion County ranks

Position among the 67 counties of Pennsylvania, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn PennsylvaniaNationally
Population36,68057th of 671,277th of 3,144
Land area600.8 sq mi38th of 671,621st of 3,144
Population density61.0 per sq mi51st of 671,292nd of 3,144
Median household income$62,64947th of 671,834th of 3,143

Full data for Clarion County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population36,680Vintage 2025 Population Estimates
Population in 202037,200Vintage 2025 Population Estimates
2020 estimates base?37,237Vintage 2025 Population Estimates
Land area600.8 sq mi2025 Gazetteer Files
Water area9.0 sq mi2025 Gazetteer Files
Total area609.8 sq mi2025 Gazetteer Files
Population density?61.0 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$62,649American Community Survey 2020-2024 5-Year Estimates
Median home value$155,700American Community Survey 2020-2024 5-Year Estimates
Median age41.7American Community Survey 2020-2024 5-Year Estimates
Households15,049American Community Survey 2020-2024 5-Year Estimates
Housing units18,856American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
-127
373 births, 500 deaths
Net migration
+67
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 5 areas bordering Clarion County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Armstrong CountyPennsylvania57 mi63,698
Venango CountyPennsylvania27 mi49,346
Forest CountyPennsylvania25 mi6,614
Jefferson CountyPennsylvania20 mi43,255
Butler CountyPennsylvania0.4 mi200,169

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 67 counties of Pennsylvania

Open the interactive Pennsylvania county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.