County Maps US

St. Joseph County, Indiana

A county in Indiana, ranked 5 of 92 by population.

CountyFIPS 18141

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

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Population
272,861
+175 (+0.1%) since 2020
Land area
457.8
square miles. A further 0.8% of the total area is water
Population density
596
people per square mile, computed rather than published
County seat
South Bend
Seat of county government.
Established
1830
195 years ago
Largest city
South Bend city
Population 103,201.

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 St. Joseph 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 St. Joseph 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 800 by 756 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 St. Joseph 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
Population272,8615th of 92272nd of 3,144
Land area457.8 sq mi17th of 922,240th of 3,144
Population density596 per sq mi6th of 92243rd of 3,144
Median household income$66,86851st of 921,448th of 3,143

Full data for St. Joseph County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population272,861Vintage 2025 Population Estimates
Population in 2020272,686Vintage 2025 Population Estimates
2020 estimates base?272,910Vintage 2025 Population Estimates
Land area457.8 sq mi2025 Gazetteer Files
Water area3.6 sq mi2025 Gazetteer Files
Total area461.4 sq mi2025 Gazetteer Files
Population density?596 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$66,868American Community Survey 2020-2024 5-Year Estimates
Median home value$192,800American Community Survey 2020-2024 5-Year Estimates
Median age36.7American Community Survey 2020-2024 5-Year Estimates
Households107,252American Community Survey 2020-2024 5-Year Estimates
Housing units118,580American 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
+127
3,101 births, 2,974 deaths
Net migration
-212
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 6 areas bordering St. Joseph 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
LaPorte CountyIndiana26 mi111,294
Marshall CountyIndiana24 mi46,599
Elkhart CountyIndiana19 mi208,774
Berrien CountyMichigan15 mi152,444
Cass CountyMichigan8.4 mi51,677
Starke CountyIndiana3.0 mi23,425

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.