County Maps US

Trumbull County, Ohio

A county in Ohio, ranked 15 of 88 by population.

CountyFIPS 39155

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

Download SVGFull Ohio map downloads

Population
198,972
-2,692 (-1.3%) since 2020
Land area
617.6
square miles. A further 2.9% of the total area is water
Population density
322
people per square mile, computed rather than published
County seat
Warren
Seat of county government.
Established
1800
225 years ago
Largest city
Warren city
Population 38,328.

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 Trumbull 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 Trumbull 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 792 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 Trumbull 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
Population198,97215th of 88360th of 3,144
Land area617.6 sq mi6th of 881,564th of 3,144
Population density322 per sq mi20th of 88415th of 3,144
Median household income$56,43579th of 882,379th of 3,143

Full data for Trumbull County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population198,972Vintage 2025 Population Estimates
Population in 2020201,664Vintage 2025 Population Estimates
2020 estimates base?202,061Vintage 2025 Population Estimates
Land area617.6 sq mi2025 Gazetteer Files
Water area18.4 sq mi2025 Gazetteer Files
Total area636 sq mi2025 Gazetteer Files
Population density?322 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$56,435American Community Survey 2020-2024 5-Year Estimates
Median home value$141,800American Community Survey 2020-2024 5-Year Estimates
Median age43.7American Community Survey 2020-2024 5-Year Estimates
Households86,550American Community Survey 2020-2024 5-Year Estimates
Housing units94,464American 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
-934
1,888 births, 2,822 deaths
Net migration
+84
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 6 areas bordering Trumbull 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
Mahoning CountyOhio25 mi224,706
Ashtabula CountyOhio25 mi96,713
Mercer CountyPennsylvania25 mi107,860
Portage CountyOhio15 mi163,404
Geauga CountyOhio11 mi95,676
Crawford CountyPennsylvania0.7 mi81,792

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.