Columbiana County area

Population and density of Columbiana County

The Census Bureau estimates that 99,377 people lived in Columbiana County on July 1, 2025. That ranks #631 of 3,222 county equivalents nationally and #27 of 88 in Ohio. Since the April 1, 2020 estimates base of 101,900, the population has declined by 2,523 (−2.5%), compared with +0.9% for Ohio as a whole.

With 531.9 square miles of land, that is 187 people per square mile (72 per km²), placing Columbiana County #662 nationally for density and #29 in Ohio. The median county equivalent has 47 people per square mile; the Ohio median is 120. Put another way, there are about 3.4 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 Columbiana County

14 incorporated places lie at least partly in Columbiana County. Together they are home to 42,373 people (42.6%); the other 57,004 (57.4%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Salem city, with 11,650 residents in the county (the city extends into 1 other county). The county seat, Lisbon village, has 2,496 residents. Among places with at least 1,000 residents in 2020, Columbiana city grew fastest since then (+3.9%).

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

Metropolitan area

Columbiana County is a central county of the Salem, OH Micropolitan Statistical Area. Columbiana County is the area’s only county equivalent, so the micro area has the same 531.9 square miles of land. By combined land it ranks #413 of 542 micropolitan areas, and #36 by population. It belongs to the Youngstown-Warren-Salem, OH Combined Statistical Area.

ZIP codes

28 ZIP Code Tabulation Areas have land in Columbiana County; 19 of them have most of their land inside the county, and the others mainly cover neighboring areas.

43920439304393243945439624396844408444134441544423444274443144432444414444344445444544445544460444904449344601446094461944625446344465744665

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 Columbiana County

Columbiana County shares a land border with 7 county equivalents, including 3 in Pennsylvania and West Virginia. It has more land than 6 of them. The largest neighbor is Stark County (574.9 mi²) and the smallest is Hancock County (82.6 mi²). Together with its neighbors, Columbiana County forms a block of 3,195.9 mi² of land, of which it holds 16.6%.

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

Columbiana County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.9 times as much. Ohio’s county land could hold about 77 areas the size of Columbiana County.

Another way to picture it: the same land area would fill a square about 23.1 miles (37.1 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 Columbiana County?

Columbiana County has more land than 1,256 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 Columbiana County at #2,058 nationally by total area, 92 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 0.5%, compared with a national county-equivalent median of 1.2% — 0.6 percentage points lower. 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 Columbiana 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.