County Maps US

Spencer County, Kentucky

A county in Kentucky, ranked 55 of 120 by population.

CountyFIPS 21215

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

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Population
20,998
+1,502 (+7.7%) since 2020
Land area
186.7
square miles. A further 2.6% of the total area is water
Population density
112
people per square mile, computed rather than published
County seat
Taylorsville
Seat of county government.
Established
1824
201 years ago
Largest city
Taylorsville city
Population 1,333.

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 Spencer 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 Spencer 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 539 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 Spencer 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
Population20,99855th of 1201,773rd of 3,144
Land area186.7 sq mi110th of 1203,018th of 3,144
Population density112 per sq mi25th of 120840th of 3,144
Median household income$102,6182nd of 120150th of 3,143

Full data for Spencer County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population20,998Vintage 2025 Population Estimates
Population in 202019,496Vintage 2025 Population Estimates
2020 estimates base?19,418Vintage 2025 Population Estimates
Land area186.7 sq mi2025 Gazetteer Files
Water area5.0 sq mi2025 Gazetteer Files
Total area191.7 sq mi2025 Gazetteer Files
Population density?112 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$102,618American Community Survey 2020-2024 5-Year Estimates
Median home value$330,000American Community Survey 2020-2024 5-Year Estimates
Median age42.9American Community Survey 2020-2024 5-Year Estimates
Households7,308American Community Survey 2020-2024 5-Year Estimates
Housing units7,712American 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
-2
191 births, 193 deaths
Net migration
+295
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 5 areas bordering Spencer 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
Nelson CountyKentucky19 mi49,036
Shelby CountyKentucky19 mi51,243
Bullitt CountyKentucky12 mi86,454
Anderson CountyKentucky11 mi25,225
Jefferson CountyKentucky2.0 mi795,222

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.