Trumbull County area

Population and density of Trumbull County

The Census Bureau estimates that 198,972 people lived in Trumbull County on July 1, 2025. That ranks #361 of 3,222 county equivalents nationally and #15 of 88 in Ohio. Since the April 1, 2020 estimates base of 202,061, the population has declined by 3,089 (−1.5%), compared with +0.9% for Ohio as a whole.

With 617.6 square miles of land, that is 322 people per square mile (124 per km²), placing Trumbull County #485 nationally for density and #20 in Ohio. The median county equivalent has 47 people per square mile; the Ohio median is 120. Put another way, there are about 2 acres of land per resident.

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Trumbull County

12 incorporated places lie at least partly in Trumbull County. Together they are home to 92,058 people (46.3%); the other 106,914 (53.7%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Warren city, with 38,328 residents in the county. By land, Youngstown city is the largest at 33.9 mi² across all its counties.

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Trumbull County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Trumbull County is a central county of the Youngstown-Warren, OH Metropolitan Statistical Area. Its 2 county equivalents have 423,678 residents on 1,029.1 square miles of land; Trumbull County accounts for 60% of the land and 47% of the residents. By combined land it ranks #275 of 393 metropolitan areas, and #134 by population. It belongs to the Youngstown-Warren-Salem, OH Combined Statistical Area.

ZIP codes

31 ZIP Code Tabulation Areas have land in Trumbull County; 25 of them have most of their land inside the county, and the others mainly cover neighboring areas.

44062440764428844402444034440444410444174441844420444244442544428444304443744438444394444044444444464445044470444734448144483444844448544491445044450544509

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Trumbull County

Trumbull County shares a land border with 6 county equivalents, including 2 in Pennsylvania. It has more land than 3 of them. The largest neighbor is Crawford County (1,012.4 mi²) and the smallest is Geauga County (400.4 mi²). Together with its neighbors, Trumbull County forms a block of 4,304.3 mi² of land, of which it holds 14.3%.

How big is Trumbull County compared with U.S. states?

Trumbull County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.7 times as much. Ohio’s county land could hold about 66 areas the size of Trumbull County.

Another way to picture it: the same land area would fill a square about 24.9 miles (40 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Trumbull County?

Trumbull County has more land than 1,658 of the other 3,221 county equivalents in the dataset.

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Trumbull County at #1,626 nationally by total area, 62 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 2.9%, compared with a national county-equivalent median of 1.2% — 1.7 percentage points higher. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Trumbull County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.