County Maps US

Washington County, Indiana

A county in Indiana, ranked 57 of 92 by population.

CountyFIPS 18175

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

Download SVGFull Indiana map downloads

Population
28,383
+153 (+0.5%) since 2020
Land area
513.7
square miles. A further 0.6% of the total area is water
Population density
55.3
people per square mile, computed rather than published
County seat
Salem
Seat of county government.
Established
1814
211 years ago
Largest city
Salem city
Population 6,427.

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 Washington 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 Washington 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 792 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 Washington 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
Population28,38357th of 921,498th of 3,144
Land area513.7 sq mi7th of 922,028th of 3,144
Population density55.3 per sq mi71st of 921,376th of 3,144
Median household income$64,64164th of 921,659th of 3,143

Full data for Washington County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population28,383Vintage 2025 Population Estimates
Population in 202028,230Vintage 2025 Population Estimates
2020 estimates base?28,161Vintage 2025 Population Estimates
Land area513.7 sq mi2025 Gazetteer Files
Water area2.9 sq mi2025 Gazetteer Files
Total area516.6 sq mi2025 Gazetteer Files
Population density?55.3 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$64,641American Community Survey 2020-2024 5-Year Estimates
Median home value$172,200American Community Survey 2020-2024 5-Year Estimates
Median age41.5American Community Survey 2020-2024 5-Year Estimates
Households11,229American Community Survey 2020-2024 5-Year Estimates
Housing units12,222American 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
-57
323 births, 380 deaths
Net migration
+81
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 8 areas bordering Washington 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
Jackson CountyIndiana40 mi47,370
Orange CountyIndiana18 mi19,834
Clark CountyIndiana18 mi130,451
Scott CountyIndiana14 mi25,053
Harrison CountyIndiana12 mi40,437
Lawrence CountyIndiana7.9 mi45,568
Crawford CountyIndiana2.9 mi10,509
Floyd CountyIndiana2.1 mi82,153

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.