Auglaize County area

Population and density of Auglaize County

The Census Bureau estimates that 45,909 people lived in Auglaize County on July 1, 2025. That ranks #1,090 of 3,222 county equivalents nationally and #53 of 88 in Ohio. Since the April 1, 2020 estimates base of 46,421, the population has declined by 512 (−1.1%), compared with +0.9% for Ohio as a whole.

With 401.4 square miles of land, that is 114 people per square mile (44 per km²), placing Auglaize County #907 nationally for density and #48 in Ohio. The median county equivalent has 47 people per square mile; the Ohio median is 120. Put another way, there are about 5.6 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 Auglaize County

8 incorporated places lie at least partly in Auglaize County. Together they are home to 27,834 people (60.6%); the other 18,075 (39.4%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Wapakoneta city, with 9,711 residents in the county.

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

Metropolitan area

Auglaize County is a central county of the Wapakoneta, OH Micropolitan Statistical Area. Auglaize County is the area’s only county equivalent, so the micro area has the same 401.4 square miles of land. By combined land it ranks #491 of 542 micropolitan areas, and #261 by population. It belongs to the Lima-Van Wert-Celina, OH Combined Statistical Area.

ZIP codes

18 ZIP Code Tabulation Areas have land in Auglaize County; 10 of them have most of their land inside the county, and the others mainly cover neighboring areas.

433314530645334458064581945845458504586245865458694587045871458844588545887458884589545896

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 Auglaize County

Auglaize County shares a land border with 6 county equivalents. Each of them has more land than Auglaize County. The largest neighbor is Hardin County (470.3 mi²) and the smallest is Allen County (402.5 mi²). Together with its neighbors, Auglaize County forms a block of 3,012 mi² of land, of which it holds 13.3%.

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

Auglaize County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2.6 times as much. Ohio’s county land could hold about 102 areas the size of Auglaize County.

Another way to picture it: the same land area would fill a square about 20 miles (32.2 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 Auglaize County?

Auglaize County has more land than 701 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 Auglaize County at #2,595 nationally by total area, 74 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 0.1%, compared with a national county-equivalent median of 1.2% — 1 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 Auglaize 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.