County Maps US

Obion County, Tennessee

A county in Tennessee, ranked 50 of 95 by population.

CountyFIPS 47131

Within Tennessee
Obion County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

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Population
30,067
-712 (-2.3%) since 2020
Land area
544.9
square miles. A further 1.9% of the total area is water
Population density
55.2
people per square mile, computed rather than published
County seat
Union City
Seat of county government.
Established
1823
202 years ago
Largest city
Union City city
Population 10,814.

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 Obion 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 Obion County, Tennessee 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 489 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 Obion County ranks

Position among the 95 counties of Tennessee, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn TennesseeNationally
Population30,06750th of 951,443rd of 3,144
Land area544.9 sq mi26th of 951,914th of 3,144
Population density55.2 per sq mi63rd of 951,377th of 3,144
Median household income$54,61366th of 952,498th of 3,143

Full data for Obion County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population30,067Vintage 2025 Population Estimates
Population in 202030,779Vintage 2025 Population Estimates
2020 estimates base?30,795Vintage 2025 Population Estimates
Land area544.9 sq mi2025 Gazetteer Files
Water area10.6 sq mi2025 Gazetteer Files
Total area555.5 sq mi2025 Gazetteer Files
Population density?55.2 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$54,613American Community Survey 2020-2024 5-Year Estimates
Median home value$133,600American Community Survey 2020-2024 5-Year Estimates
Median age41.8American Community Survey 2020-2024 5-Year Estimates
Households12,527American Community Survey 2020-2024 5-Year Estimates
Housing units14,326American 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
-135
353 births, 488 deaths
Net migration
-55
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 Obion 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
Weakley CountyTennessee33 mi33,261
Fulton CountyKentucky28 mi6,218
Lake CountyTennessee24 mi6,249
Dyer CountyTennessee18 mi36,320
Gibson CountyTennessee12 mi51,779
Hickman CountyKentucky0.4 mi4,372

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

All 95 counties of Tennessee

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

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