Oceana County area

Population and density of Oceana County

The Census Bureau estimates that 27,177 people lived in Oceana County on July 1, 2025. That ranks #1,584 of 3,222 county equivalents nationally and #51 of 83 in Michigan. Since the April 1, 2020 estimates base of 26,664, the population has grown by 513 (+1.9%), compared with +0.5% for Michigan as a whole.

With 538.1 square miles of land, that is 51 people per square mile (20 per km²), placing Oceana County #1,546 nationally for density and #50 in Michigan. The median county equivalent has 47 people per square mile; the Michigan median is 62. Put another way, there are about 13 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 Oceana County

Oceana County is divided into 17 municipalities and townships. In Michigan, county subdivisions are local governments, and together they cover all of the county’s land and residents; a few are unorganized areas without their own government.

The most populous is Shelby township, with 4,143 residents (15.2% of the county). The largest by land is Benona township, at 40.7 mi², or 7.6% of the county’s land. The county seat, Hart township, has 2,073 residents. Among those with at least 1,000 residents in 2020, Greenwood township grew fastest since then (+2.9%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each subdivision inside Oceana County. Land: 2026 Census Gazetteer. How communities are listed.

Metropolitan area

Oceana County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.

ZIP codes

12 ZIP Code Tabulation Areas have land in Oceana County; 8 of them have most of their land inside the county, and the others mainly cover neighboring areas.

494024941249420494214942549436494374944649449494524945549459

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 Oceana County

Oceana County shares a land border with 3 county equivalents. It has more land than 2 of them. The largest neighbor is Newaygo County (838.9 mi²) and the smallest is Mason County (495 mi²). Together with its neighbors, Oceana County forms a block of 2,375.9 mi² of land, of which it holds 22.6%.

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

Oceana 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. Michigan’s county land could hold about 105 areas the size of Oceana County.

Another way to picture it: the same land area would fill a square about 23.2 miles (37.3 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 Oceana County?

Oceana County has more land than 1,279 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 Oceana County at #526 nationally by total area, 1,417 places closer to the top than its land rank. The water assigned to this geography moves it ahead of some county equivalents with more land.

Its water share is 58.8%, compared with a national county-equivalent median of 1.2% — 57.6 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 Oceana 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.