County Maps US

Jefferson County, Mississippi

A county in Mississippi, ranked 79 of 82 by population.

CountyFIPS 28063

Within Mississippi
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 Fayette, the county seat, located via the 2025 Census Gazetteer.

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Population
6,825
-423 (-5.8%) since 2020
Land area
519.9
square miles. A further 1.4% of the total area is water
Population density
13.1
people per square mile, computed rather than published
County seat
Fayette
Seat of county government.
Established
1799
226 years ago
Largest city
Fayette city
Population 1,315.

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, Mississippi 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 432 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 82 counties of Mississippi, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MississippiNationally
Population6,82579th of 822,669th of 3,144
Land area519.9 sq mi46th of 822,006th of 3,144
Population density13.1 per sq mi78th of 822,453rd of 3,144
Median household income$38,30570th of 823,090th 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
Population6,825Vintage 2025 Population Estimates
Population in 20207,248Vintage 2025 Population Estimates
2020 estimates base?7,259Vintage 2025 Population Estimates
Land area519.9 sq mi2025 Gazetteer Files
Water area7.3 sq mi2025 Gazetteer Files
Total area527.3 sq mi2025 Gazetteer Files
Population density?13.1 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$38,305American Community Survey 2020-2024 5-Year Estimates
Median home value$81,300American Community Survey 2020-2024 5-Year Estimates
Median age43.1American Community Survey 2020-2024 5-Year Estimates
Households2,494American Community Survey 2020-2024 5-Year Estimates
Housing units3,390American 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
-26
78 births, 104 deaths
Net migration
-35
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
Claiborne CountyMississippi35 mi8,058
Tensas ParishLouisiana31 mi3,700
Franklin CountyMississippi25 mi7,491
Adams CountyMississippi22 mi30,061
Copiah CountyMississippi6.0 mi27,497
Lincoln CountyMississippi6.0 mi35,012

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

All 82 counties of Mississippi

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

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