County Maps US

Marquette County, Michigan

The largest of Michigan's 83 counties by land area.

CountyFIPS 26103

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

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Population
68,064
+1,522 (+2.3%) since 2020
Land area
1,809
square miles. A further 47.2% of the total area is water
Population density
37.6
people per square mile, computed rather than published
County seat
Marquette
Seat of county government.
Established
1843
182 years ago
Largest city
Marquette city
Population 21,944.

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 Marquette 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 Marquette 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 588 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 Marquette 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
Population68,06428th of 83807th of 3,144
Land area1,809 sq mi1st of 83326th of 3,144
Population density37.6 per sq mi58th of 831,728th of 3,144
Median household income$65,42934th of 831,598th of 3,143

Full data for Marquette County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population68,064Vintage 2025 Population Estimates
Population in 202066,542Vintage 2025 Population Estimates
2020 estimates base?66,542Vintage 2025 Population Estimates
Land area1,809 sq mi2025 Gazetteer Files
Water area1,616 sq mi2025 Gazetteer Files
Total area3,425 sq mi2025 Gazetteer Files
Population density?37.6 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$65,429American Community Survey 2020-2024 5-Year Estimates
Median home value$216,500American Community Survey 2020-2024 5-Year Estimates
Median age39.3American Community Survey 2020-2024 5-Year Estimates
Households28,255American Community Survey 2020-2024 5-Year Estimates
Housing units33,607American 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
-168
501 births, 669 deaths
Net migration
+417
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 8 areas bordering Marquette 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
Alger CountyMichigan74 mi8,641
Baraga CountyMichigan51 mi8,169
Keweenaw CountyMichigan45 mi2,186
Dickinson CountyMichigan42 mi25,827
Delta CountyMichigan24 mi36,582
Menominee CountyMichigan12 mi22,941
Iron CountyMichigan12 mi11,757
Houghton CountyMichigan11 mi37,842

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.