Oscoda County area

Oscoda County, Michigan covers 571.5 square miles: 565.7 square miles of land and 5.844 square miles of water. Its county seat is Mio. An estimated 8,723 people lived there in 2025.

Official Census measurements · GEOID 261352026 Gazetteer · retrieved September 27, 2026
Land area565.7 mi²
Water area5.844 mi²
Population (2025)8,723
People per mi²15

County outline

Generalized outline of Oscoda County, Michigan
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Oscoda County is located

Oscoda County highlighted on a map of all U.S. county equivalents. About the maps

Area breakdown

Land accounts for 99% of Oscoda County’s measured area and water for 1%. Its combined area converts to 1,480.2 square kilometers or approximately 365,772 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land565.6741,465.089362,031.4
Water5.84415.1363,740.2
Total571.5181,480.225365,771.5

How Oscoda County compares

By original Census land area, Oscoda County ranks #46 of 83 in Michigan and #1812 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 0.996 times the Michigan county-equivalent median of 567.8 square miles. It accounts for 1% of the combined county land area in the state.

See the complete Michigan ranking · What counts as a county equivalent?

Population and density of Oscoda County

The Census Bureau estimates that 8,723 people lived in Oscoda County on July 1, 2025. That ranks #2,587 of 3,222 county equivalents nationally and #77 of 83 in Michigan. Since the April 1, 2020 estimates base of 8,219, the population has grown by 504 (+6.1%), compared with +0.5% for Michigan as a whole.

With 565.7 square miles of land, that is 15 people per square mile (6 per km²), placing Oscoda County #2,463 nationally for density and #74 in Michigan. The median county equivalent has 47 people per square mile; the Michigan median is 62. Put another way, there are about 42 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate8,2308,3148,3898,5648,6298,723
Change—+84+75+175+65+94

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 Oscoda County

Oscoda County is divided into 6 municipalities and townships. In Michigan, county subdivisions are local governments, and together they cover all of the county’s land and residents.

The most populous is Big Creek township, with 2,739 residents (31.4% of the county). The largest by land is Mentor township, at 142 mi², or 25.1% of the county’s land. Among those with at least 1,000 residents in 2020, Greenwood township grew fastest since then (+7.1%).

County subdivisionPopulation 2025Since 2020Land mi²Share of county land
Big Creek township2,739+6%141.725%
Comins township1,982+5.8%70.512.5%
Greenwood township1,244+7.1%7012.4%
Elmer township1,205+6.5%7112.5%
Mentor township1,101+5.7%14225.1%
Clinton township452+5.6%70.512.5%

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

Metropolitan area

Oscoda 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

8 ZIP Code Tabulation Areas have land in Oscoda County; 5 of them have most of their land inside the county, and the others mainly cover neighboring areas.

4861948621486364864748654487284876149756

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 Oscoda County

Oscoda County shares a land border with 4 county equivalents. It has more land than 3 of them. The largest neighbor is Alcona County (674.7 mi²) and the smallest is Montmorency County (546.7 mi²). Together with its neighbors, Oscoda County forms a block of 2,906.9 mi² of land, of which it holds 19.5%.

Map of Oscoda County and the 4 county equivalents that border it Crawford County, Michigan: 556.4 mi² landAlcona County, Michigan: 674.7 mi² landOgemaw County, Michigan: 563.5 mi² landMontmorency County, Michigan: 546.7 mi² land
Oscoda County (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection. How borders are determined.
Bordering county equivalentLand mi²Size vs. OscodaCompare
Alcona County674.71.2× largerCompare
Ogemaw County563.5about the sameCompare
Crawford County556.4about the sameCompare
Montmorency County546.7about the sameCompare

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

Oscoda County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 1.8 times as much. Michigan’s county land could hold about 100 areas the size of Oscoda County.

Land area: Oscoda County and the closest-sized states
Oscoda County565.7 mi²
Rhode Island1,033.9 mi²

Another way to picture it: the same land area would fill a square about 23.8 miles (38.3 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 Oscoda County?

Oscoda County has more land than 1,410 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Oscoda County565.7 mi²
Michigan median567.8 mi²
National median604.5 mi²

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 Oscoda County at #1,914 nationally by total area, 102 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 1%, compared with a national county-equivalent median of 1.2% — 0.1 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 Oscoda County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#1811Black Hawk County, Iowa565.8Compare
#1812Oscoda County, Michigan565.7This county
#1813Rockingham County, North Carolina565.7Compare

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.

Representative coordinates

The Census internal point is 44.687255, -84.126903. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.

Source and precision

U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 1,465,088,031 m²; AWATER: 15,136,483 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Oscoda County?

Oscoda County, Michigan has 565.7 square miles (1,465.1 km²) of land and 5.844 square miles of water, for a total area of 571.5 square miles. It ranks #1812 of 3,222 U.S. county equivalents by land area.

Is Oscoda County the largest county in Michigan?

No. Oscoda County ranks #46 of 83 in Michigan by land area. The largest is Marquette County, with 1,809.1 square miles of land.

What counties border Oscoda County?

Oscoda County shares a land border with Crawford County, Alcona County, Ogemaw County, and Montmorency County.

What is the population of Oscoda County?

The Census Bureau estimates Oscoda County had 8,723 residents on July 1, 2025, ranking #2,587 of 3,222 county equivalents. That is 15 people per square mile of land.

What is the county seat of Oscoda County?

The county seat of Oscoda County is Mio.

What cities and towns are in Oscoda County?

Oscoda County has 6 county subdivisions (cities, towns and townships). The most populous five are Big Creek township, Comins township, Greenwood township, Elmer township, and Mentor township.

Is Oscoda County part of a metropolitan area?

No. Oscoda County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.

How many ZIP codes are in Oscoda County?

8 ZIP Code Tabulation Areas have land in Oscoda County, and 5 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.

How does Oscoda County compare with U.S. states?

It has less land than every state. Rhode Island, the smallest, has 1.8 times as much land.

How many acres of land are in Oscoda County?

The land measurement converts to approximately 362,031 acres. Including water, total area is approximately 365,772 acres. One square mile equals 640 acres.

Why might another source show a different area?

Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.

Can this establish a property boundary?

No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.

Cite this county

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