Morrow County area

Population and density of Morrow County

The Census Bureau estimates that 36,305 people lived in Morrow County on July 1, 2025. That ranks #1,320 of 3,222 county equivalents nationally and #68 of 88 in Ohio. Since the April 1, 2020 estimates base of 34,955, the population has grown by 1,350 (+3.9%), compared with +0.9% for Ohio as a whole.

With 406.1 square miles of land, that is 89 people per square mile (35 per km²), placing Morrow County #1,079 nationally for density and #63 in Ohio. The median county equivalent has 47 people per square mile; the Ohio median is 120. Put another way, there are about 7.2 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 Morrow County

8 incorporated places lie at least partly in Morrow County. Together they are home to 7,145 people (19.7%); the other 29,160 (80.3%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Mount Gilead village, with 3,575 residents in the county. By land, Galion city is the largest at 7.426 mi² across all its counties. Among places with at least 1,000 residents in 2020, Cardington village grew fastest since then (+7.9%).

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

Metropolitan area

Morrow County is an outlying county of the Columbus, OH Metropolitan Statistical Area. Its 10 county equivalents have 2,242,028 residents on 4,797.5 square miles of land; Morrow County accounts for 8.5% of the land and 1.6% of the residents. By combined land it ranks #55 of 393 metropolitan areas, and #32 by population. It belongs to the Columbus-Marion-Zanesville, OH Combined Statistical Area.

ZIP codes

18 ZIP Code Tabulation Areas have land in Morrow County; 9 of them have most of their land inside the county, and the others mainly cover neighboring areas.

430034301143019430504331443315433174332043321433254333443338433504335644813448334490344904

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 Morrow County

Morrow County shares a land border with 5 county equivalents. It has more land than 2 of them. The largest neighbor is Knox County (525.5 mi²) and the smallest is Crawford County (401.8 mi²). Together with its neighbors, Morrow County forms a block of 2,675.6 mi² of land, of which it holds 15.2%.

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

Morrow County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.5 times as much. Ohio’s county land could hold about 101 areas the size of Morrow County.

Another way to picture it: the same land area would fill a square about 20.2 miles (32.4 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 Morrow County?

Morrow County has more land than 726 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 Morrow County at #2,562 nationally by total area, 66 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 0.3%, compared with a national county-equivalent median of 1.2% — 0.9 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 Morrow 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.