County Maps US

Shiawassee County, Michigan

A county in Michigan, ranked 29 of 83 by population.

CountyFIPS 26155

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

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Population
67,681
-309 (-0.5%) since 2020
Land area
531.1
square miles. A further 1.8% of the total area is water
Population density
127
people per square mile, computed rather than published
County seat
Corunna
Seat of county government.
Established
1822
203 years ago
Largest city
Owosso city
Population 14,437.

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 Shiawassee 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 Shiawassee 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 738 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 Shiawassee 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
Population67,68129th of 83811th of 3,144
Land area531.1 sq mi65th of 831,974th of 3,144
Population density127 per sq mi26th of 83768th of 3,144
Median household income$67,40428th of 831,394th of 3,143

Full data for Shiawassee County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population67,681Vintage 2025 Population Estimates
Population in 202067,990Vintage 2025 Population Estimates
2020 estimates base?68,078Vintage 2025 Population Estimates
Land area531.1 sq mi2025 Gazetteer Files
Water area9.8 sq mi2025 Gazetteer Files
Total area540.9 sq mi2025 Gazetteer Files
Population density?127 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$67,404American Community Survey 2020-2024 5-Year Estimates
Median home value$171,600American Community Survey 2020-2024 5-Year Estimates
Median age43.2American Community Survey 2020-2024 5-Year Estimates
Households28,126American Community Survey 2020-2024 5-Year Estimates
Housing units30,354American 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
-198
666 births, 864 deaths
Net migration
+48
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 Shiawassee 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
Genesee CountyMichigan24 mi401,093
Clinton CountyMichigan24 mi80,432
Saginaw CountyMichigan22 mi187,688
Livingston CountyMichigan12 mi197,315
Ingham CountyMichigan10 mi289,709
Gratiot CountyMichigan0.7 mi41,190

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

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.