County Maps US

Oakland County, Michigan

A county in Michigan, ranked 2 of 83 by population.

CountyFIPS 26125

Within Michigan
Oakland County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Pontiac, the county seat, located via the 2025 Census Gazetteer.

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Population
1,288,337
+15,813 (+1.2%) since 2020
Land area
867.4
square miles. A further 4.4% of the total area is water
Population density
1,485
people per square mile, computed rather than published
County seat
Pontiac
Seat of county government.
Established
1820
205 years ago
Largest city
Troy city
Population 88,733.

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Oakland County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Oakland County, Michigan from the USGS National Map, with its boundary outlined
Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 782 by 800 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Oakland County ranks

Position among the 83 counties of Michigan, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MichiganNationally
Population1,288,3372nd of 8334th of 3,144
Land area867.4 sq mi15th of 83947th of 3,144
Population density1,485 per sq mi3rd of 83107th of 3,144
Median household income$97,7603rd of 83185th of 3,143

Full data for Oakland County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population1,288,337Vintage 2025 Population Estimates
Population in 20201,272,524Vintage 2025 Population Estimates
2020 estimates base?1,274,375Vintage 2025 Population Estimates
Land area867.4 sq mi2025 Gazetteer Files
Water area39.8 sq mi2025 Gazetteer Files
Total area907.2 sq mi2025 Gazetteer Files
Population density?1,485 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$97,760American Community Survey 2020-2024 5-Year Estimates
Median home value$343,600American Community Survey 2020-2024 5-Year Estimates
Median age41.3American Community Survey 2020-2024 5-Year Estimates
Households530,460American Community Survey 2020-2024 5-Year Estimates
Housing units561,348American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths
+686
12,202 births, 11,516 deaths
Net migration
+5,004
More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 6 areas bordering Oakland County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering areaStateShared borderPopulation
Macomb CountyMichigan30 mi886,221
Livingston CountyMichigan24 mi197,315
Wayne CountyMichigan24 mi1,769,038
Genesee CountyMichigan18 mi401,093
Lapeer CountyMichigan18 mi89,516
Washtenaw CountyMichigan5.8 mi370,214

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

Side by side

All 83 counties of Michigan

Open the interactive Michigan county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.