County Maps US

Martin County, Indiana

A county in Indiana, ranked 88 of 92 by population.

CountyFIPS 18101

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

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Population
9,856
+48 (+0.5%) since 2020
Land area
335.8
square miles. A further 1.4% of the total area is water
Population density
29.4
people per square mile, computed rather than published
County seat
Shoals
Seat of county government.
Established
1820
205 years ago
Largest city
Loogootee city
Population 2,633.

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 Martin 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 Martin 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 415 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 Martin 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
Population9,85688th of 922,418th of 3,144
Land area335.8 sq mi72nd of 922,724th of 3,144
Population density29.4 per sq mi89th of 921,945th of 3,144
Median household income$68,59445th of 921,293rd of 3,143

Full data for Martin County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population9,856Vintage 2025 Population Estimates
Population in 20209,808Vintage 2025 Population Estimates
2020 estimates base?9,810Vintage 2025 Population Estimates
Land area335.8 sq mi2025 Gazetteer Files
Water area4.6 sq mi2025 Gazetteer Files
Total area340.4 sq mi2025 Gazetteer Files
Population density?29.4 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$68,594American Community Survey 2020-2024 5-Year Estimates
Median home value$159,400American Community Survey 2020-2024 5-Year Estimates
Median age42.7American Community Survey 2020-2024 5-Year Estimates
Households3,904American Community Survey 2020-2024 5-Year Estimates
Housing units4,583American 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
+12
136 births, 124 deaths
Net migration
-45
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 5 areas bordering Martin 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
Daviess CountyIndiana29 mi34,209
Lawrence CountyIndiana15 mi45,568
Dubois CountyIndiana15 mi44,016
Greene CountyIndiana12 mi31,165
Orange CountyIndiana11 mi19,834

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.