County Maps US

Jefferson County, Alabama

The most populous of Alabama's 67 counties.

CountyFIPS 01073

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

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Population
665,742
-8,978 (-1.3%) since 2020
Land area
1,112
square miles. A further 1.1% of the total area is water
Population density
599
people per square mile, computed rather than published
County seat
Birmingham
Seat of county government.
Established
1819
206 years ago
Largest city
Birmingham city
Population 193,944 for the whole place, which extends beyond this county.

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 Jefferson 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 Jefferson 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 706 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 Jefferson 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
Population665,7421st of 67108th of 3,144
Land area1,112 sq mi5th of 67568th of 3,144
Population density599 per sq mi1st of 67239th of 3,144
Median household income$66,38810th of 671,479th of 3,143

Full data for Jefferson County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population665,742Vintage 2025 Population Estimates
Population in 2020674,720Vintage 2025 Population Estimates
2020 estimates base?674,330Vintage 2025 Population Estimates
Land area1,112 sq mi2025 Gazetteer Files
Water area12.6 sq mi2025 Gazetteer Files
Total area1,124 sq mi2025 Gazetteer Files
Population density?599 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$66,388American Community Survey 2020-2024 5-Year Estimates
Median home value$240,000American Community Survey 2020-2024 5-Year Estimates
Median age37.7American Community Survey 2020-2024 5-Year Estimates
Households269,883American Community Survey 2020-2024 5-Year Estimates
Housing units310,789American 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
+323
7,978 births, 7,655 deaths
Net migration
-1,173
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 6 areas bordering Jefferson 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
Shelby CountyAlabama50 mi238,552
Walker CountyAlabama42 mi65,140
Tuscaloosa CountyAlabama40 mi241,368
Blount CountyAlabama25 mi60,156
St. Clair CountyAlabama22 mi98,206
Bibb CountyAlabama2.3 mi22,262

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.