County Maps US

Ross County, Ohio

A county in Ohio, ranked 32 of 88 by population.

CountyFIPS 39141

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

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Population
76,429
-638 (-0.8%) since 2020
Land area
689.2
square miles. A further 0.6% of the total area is water
Population density
111
people per square mile, computed rather than published
County seat
Chillicothe
Seat of county government.
Established
1798
227 years ago
Largest city
Chillicothe city
Population 21,815.

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 Ross 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 Ross 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 800 by 578 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 Ross 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
Population76,42932nd of 88748th of 3,144
Land area689.2 sq mi2nd of 881,359th of 3,144
Population density111 per sq mi49th of 88845th of 3,144
Median household income$61,30362nd of 881,951st of 3,143

Full data for Ross County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population76,429Vintage 2025 Population Estimates
Population in 202077,067Vintage 2025 Population Estimates
2020 estimates base?77,094Vintage 2025 Population Estimates
Land area689.2 sq mi2025 Gazetteer Files
Water area3.9 sq mi2025 Gazetteer Files
Total area693 sq mi2025 Gazetteer Files
Population density?111 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$61,303American Community Survey 2020-2024 5-Year Estimates
Median home value$171,500American Community Survey 2020-2024 5-Year Estimates
Median age41.1American Community Survey 2020-2024 5-Year Estimates
Households29,808American Community Survey 2020-2024 5-Year Estimates
Housing units32,092American 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
-218
721 births, 939 deaths
Net migration
+653
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 7 areas bordering Ross 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
Pickaway CountyOhio32 mi62,978
Pike CountyOhio31 mi27,061
Highland CountyOhio18 mi43,823
Fayette CountyOhio11 mi28,552
Vinton CountyOhio11 mi12,645
Hocking CountyOhio6.9 mi27,512
Jackson CountyOhio3.8 mi32,817

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.