County Maps US

Trigg County, Kentucky

A county in Kentucky, ranked 76 of 120 by population.

CountyFIPS 21221

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

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Population
14,512
+435 (+3.1%) since 2020
Land area
441.4
square miles. A further 8.3% of the total area is water
Population density
32.9
people per square mile, computed rather than published
County seat
Cadiz
Seat of county government.
Established
1820
205 years ago
Largest city
Cadiz city
Population 2,771.

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 Trigg 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 Trigg County, Kentucky 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 747 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 Trigg County ranks

Position among the 120 counties of Kentucky, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn KentuckyNationally
Population14,51276th of 1202,119th of 3,144
Land area441.4 sq mi21st of 1202,301st of 3,144
Population density32.9 per sq mi104th of 1201,841st of 3,144
Median household income$59,85752nd of 1202,096th of 3,143

Full data for Trigg County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population14,512Vintage 2025 Population Estimates
Population in 202014,077Vintage 2025 Population Estimates
2020 estimates base?14,053Vintage 2025 Population Estimates
Land area441.4 sq mi2025 Gazetteer Files
Water area39.9 sq mi2025 Gazetteer Files
Total area481.3 sq mi2025 Gazetteer Files
Population density?32.9 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$59,857American Community Survey 2020-2024 5-Year Estimates
Median home value$207,700American Community Survey 2020-2024 5-Year Estimates
Median age45.8American Community Survey 2020-2024 5-Year Estimates
Households6,060American Community Survey 2020-2024 5-Year Estimates
Housing units7,652American 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
-63
166 births, 229 deaths
Net migration
+61
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 6 areas bordering Trigg 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
Christian CountyKentucky28 mi70,115
Stewart CountyTennessee23 mi14,439
Lyon CountyKentucky17 mi9,123
Caldwell CountyKentucky9.3 mi12,609
Marshall CountyKentucky8.8 mi31,659
Calloway CountyKentucky5.3 mi39,421

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

All 120 counties of Kentucky

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

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