County Maps US

Madison County, Indiana

A county in Indiana, ranked 13 of 92 by population.

CountyFIPS 18095

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

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Population
135,088
+4,933 (+3.8%) since 2020
Land area
451.9
square miles. A further 0.2% of the total area is water
Population density
299
people per square mile, computed rather than published
County seat
Anderson
Seat of county government.
Established
1823
202 years ago
Largest city
Anderson city
Population 56,153.

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 Madison 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 Madison County, Indiana 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 446 by 800 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 Madison County ranks

Position among the 92 counties of Indiana, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn IndianaNationally
Population135,08813th of 92492nd of 3,144
Land area451.9 sq mi19th of 922,264th of 3,144
Population density299 per sq mi15th of 92440th of 3,144
Median household income$63,03769th of 921,794th of 3,143

Full data for Madison County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population135,088Vintage 2025 Population Estimates
Population in 2020130,155Vintage 2025 Population Estimates
2020 estimates base?130,099Vintage 2025 Population Estimates
Land area451.9 sq mi2025 Gazetteer Files
Water area0.98 sq mi2025 Gazetteer Files
Total area452.9 sq mi2025 Gazetteer Files
Population density?299 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$63,037American Community Survey 2020-2024 5-Year Estimates
Median home value$161,300American Community Survey 2020-2024 5-Year Estimates
Median age40.9American Community Survey 2020-2024 5-Year Estimates
Households53,429American Community Survey 2020-2024 5-Year Estimates
Housing units59,301American 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
-381
1,406 births, 1,787 deaths
Net migration
+1,912
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 Madison 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
Delaware CountyIndiana21 mi113,106
Hamilton CountyIndiana19 mi387,036
Hancock CountyIndiana15 mi90,969
Grant CountyIndiana15 mi66,524
Tipton CountyIndiana11 mi15,319
Henry CountyIndiana9.1 mi49,137

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

All 92 counties of Indiana

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

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