County Maps US

Marion County, Alabama

A county in Alabama, ranked 38 of 67 by population.

CountyFIPS 01093

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

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Population
29,097
-95 (-0.3%) since 2020
Land area
742.3
square miles. A further 0.2% of the total area is water
Population density
39.2
people per square mile, computed rather than published
County seat
Hamilton
Seat of county government.
Established
1818
207 years ago
Largest city
Hamilton city
Population 6,769.

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 Marion 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 Marion County, Alabama 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 800 by 698 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 Marion County ranks

Position among the 67 counties of Alabama, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn AlabamaNationally
Population29,09738th of 671,473rd of 3,144
Land area742.3 sq mi25th of 671,189th of 3,144
Population density39.2 per sq mi38th of 671,689th of 3,144
Median household income$50,08844th of 672,765th of 3,143

Full data for Marion County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population29,097Vintage 2025 Population Estimates
Population in 202029,192Vintage 2025 Population Estimates
2020 estimates base?29,343Vintage 2025 Population Estimates
Land area742.3 sq mi2025 Gazetteer Files
Water area1.2 sq mi2025 Gazetteer Files
Total area743.6 sq mi2025 Gazetteer Files
Population density?39.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$50,088American Community Survey 2020-2024 5-Year Estimates
Median home value$106,600American Community Survey 2020-2024 5-Year Estimates
Median age43.9American Community Survey 2020-2024 5-Year Estimates
Households10,614American Community Survey 2020-2024 5-Year Estimates
Housing units14,220American 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
-121
329 births, 450 deaths
Net migration
-138
More people moved out than moved in.

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

The 7 areas bordering Marion 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
Franklin CountyAlabama31 mi32,449
Lamar CountyAlabama24 mi13,587
Winston CountyAlabama21 mi23,829
Fayette CountyAlabama18 mi15,872
Itawamba CountyMississippi16 mi24,152
Walker CountyAlabama6.0 mi65,140
Monroe CountyMississippi2.0 mi33,318

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

All 67 counties of Alabama

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

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