County Maps US

Delaware County, Indiana

A county in Indiana, ranked 15 of 92 by population.

CountyFIPS 18035

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

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Population
113,106
+1,342 (+1.2%) since 2020
Land area
392.1
square miles. A further 1.0% of the total area is water
Population density
288
people per square mile, computed rather than published
County seat
Muncie
Seat of county government.
Established
1827
198 years ago
Largest city
Muncie city
Population 65,466.

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 Delaware 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 Delaware 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 742 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 Delaware 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
Population113,10615th of 92568th of 3,144
Land area392.1 sq mi51st of 922,565th of 3,144
Population density288 per sq mi17th of 92452nd of 3,144
Median household income$58,12783rd of 922,252nd of 3,143

Full data for Delaware County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population113,106Vintage 2025 Population Estimates
Population in 2020111,764Vintage 2025 Population Estimates
2020 estimates base?111,904Vintage 2025 Population Estimates
Land area392.1 sq mi2025 Gazetteer Files
Water area3.8 sq mi2025 Gazetteer Files
Total area395.9 sq mi2025 Gazetteer Files
Population density?288 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$58,127American Community Survey 2020-2024 5-Year Estimates
Median home value$139,400American Community Survey 2020-2024 5-Year Estimates
Median age35.8American Community Survey 2020-2024 5-Year Estimates
Households46,256American Community Survey 2020-2024 5-Year Estimates
Housing units51,635American 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
-334
1,086 births, 1,420 deaths
Net migration
+685
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 Delaware 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
Madison CountyIndiana21 mi135,088
Henry CountyIndiana19 mi49,137
Randolph CountyIndiana16 mi24,438
Blackford CountyIndiana12 mi11,730
Grant CountyIndiana7.1 mi66,524
Jay CountyIndiana5.0 mi20,118

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.