County Maps US

Hardin County, Ohio

A county in Ohio, ranked 72 of 88 by population.

CountyFIPS 39065

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

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Population
30,072
-652 (-2.1%) since 2020
Land area
470.3
square miles. A further 0.1% of the total area is water
Population density
63.9
people per square mile, computed rather than published
County seat
Kenton
Seat of county government.
Established
1820
205 years ago
Largest city
Kenton city
Population 7,808.

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 Hardin 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 Hardin 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 726 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 Hardin 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
Population30,07272nd of 881,442nd of 3,144
Land area470.3 sq mi32nd of 882,191st of 3,144
Population density63.9 per sq mi77th of 881,259th of 3,144
Median household income$62,48459th of 881,848th of 3,143

Full data for Hardin County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population30,072Vintage 2025 Population Estimates
Population in 202030,724Vintage 2025 Population Estimates
2020 estimates base?30,691Vintage 2025 Population Estimates
Land area470.3 sq mi2025 Gazetteer Files
Water area0.24 sq mi2025 Gazetteer Files
Total area470.5 sq mi2025 Gazetteer Files
Population density?63.9 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$62,484American Community Survey 2020-2024 5-Year Estimates
Median home value$151,200American Community Survey 2020-2024 5-Year Estimates
Median age35.2American Community Survey 2020-2024 5-Year Estimates
Households11,724American Community Survey 2020-2024 5-Year Estimates
Housing units12,917American 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
-16
333 births, 349 deaths
Net migration
-166
More people moved out than moved in.

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

The 7 areas bordering Hardin 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
Logan CountyOhio20 mi46,302
Hancock CountyOhio19 mi75,034
Wyandot CountyOhio14 mi21,567
Marion CountyOhio13 mi65,115
Allen CountyOhio12 mi100,881
Auglaize CountyOhio7.3 mi45,909
Union CountyOhio5.4 mi73,446

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.