County Maps US

Richland County, Ohio

A county in Ohio, ranked 23 of 88 by population.

CountyFIPS 39139

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

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Population
124,893
-76 (-0.1%) since 2020
Land area
495.2
square miles. A further 1.0% of the total area is water
Population density
252
people per square mile, computed rather than published
County seat
Mansfield
Seat of county government.
Established
1808
217 years ago
Largest city
Mansfield city
Population 47,381.

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 Richland 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 Richland County, Ohio 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 559 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 Richland County ranks

Position among the 88 counties of Ohio, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn OhioNationally
Population124,89323rd of 88523rd of 3,144
Land area495.2 sq mi26th of 882,101st of 3,144
Population density252 per sq mi24th of 88497th of 3,144
Median household income$59,50966th of 882,122nd of 3,143

Full data for Richland County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population124,893Vintage 2025 Population Estimates
Population in 2020124,969Vintage 2025 Population Estimates
2020 estimates base?124,926Vintage 2025 Population Estimates
Land area495.2 sq mi2025 Gazetteer Files
Water area4.8 sq mi2025 Gazetteer Files
Total area500.1 sq mi2025 Gazetteer Files
Population density?252 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$59,509American Community Survey 2020-2024 5-Year Estimates
Median home value$164,800American Community Survey 2020-2024 5-Year Estimates
Median age40.9American Community Survey 2020-2024 5-Year Estimates
Households50,111American Community Survey 2020-2024 5-Year Estimates
Housing units54,668American 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
-129
1,306 births, 1,435 deaths
Net migration
+64
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 Richland 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
Ashland CountyOhio36 mi52,523
Crawford CountyOhio20 mi41,896
Morrow CountyOhio18 mi36,305
Huron CountyOhio15 mi58,250
Knox CountyOhio15 mi64,002

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

All 88 counties of Ohio

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

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