St. Joseph County, Indiana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 5th-largest in Indiana
The population of St. Joseph County, Indiana is 272,574 as of the 2023 American Community Survey, making it the 5th-largest county in Indiana. The median household income is $64,885, the median home value is $179,800, and the median age is 36.7.
The population of St. Joseph County has grown 2.6% since 2010 (266,799 → 273,744), a +0.18% annualized rate.
272,574
Population
+0.18%
Annual growth
595
People / sq mi
$64,885
Median Income
$179,800
Median Home Value
St. Joseph County covers 458 sq mi of land at 595.4 people per square mile.
About St. Joseph County, IN
St. Joseph County is a county in Indiana with a population of 272,574. It ranks #5 among counties in Indiana by population. The median age is 36.7, younger than the national median. The population is 49.0% male and 51.0% female.
The median household income in St. Joseph County is $64,885, below the US median of $74,580. 9.8% of residents live below the federal poverty level. Home values sit at a median of $179,800, with monthly rent averaging $1,030. The homeownership rate of 68.8% is higher than the national rate of 64.8%.
Educational attainment in St. Joseph County reflects 32.6% of adults 25 and older holding a bachelor's degree or higher, near the national average of 34.3%. Roughly 9.7% of workers primarily work from home, below the national work-from-home rate of 14.2%. The average commute is 21.3 minutes each way.
St. Joseph County Population History (2010-2024)
The county of St. Joseph County had a population of 266,799 in 2010 and 273,744 in 2024, a 2.6% growth over 14 years. The peak was 273,744 in 2024. Average annual growth rate: 0.18%.
273,744
Population (2024)
266,799
Population (2010)
273,744
Peak (2024)
0.18%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 266,799 |
| 2011 | 266,726 |
| 2012 | 266,576 |
| 2013 | 267,188 |
| 2014 | 268,023 |
| 2015 | 268,567 |
| 2016 | 270,042 |
| 2017 | 270,219 |
| 2018 | 270,961 |
| 2019 | 271,695 |
| 2020 | 272,688 |
| 2021 | 272,315 |
| 2022 | 272,796 |
| 2023 | 273,658 |
| 2024 | 273,744 |
Race & Ethnicity
| White | 72.1% |
| Black or African American | 12.6% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.3% |
| Two or More Races | 0.0% |
Age & Sex
36.7
Median Age
51.0%
Female
49.0%
Male
16.5%
Age 65+
Age Distribution
Children (under 15): 19.3% · Seniors (65+): 16.5%
Income & Poverty
| Median household income | $64,885$-5,166 vs state |
| Mean household income | $89,361 |
| Per-capita income | $35,714 |
| Poverty rate | 9.8%+1.4% vs state |
| Unemployment rate | 3.2% |
| Employment-to-population | 59.9% |
Top Industries by Employment
The largest employment sector in St. Joseph County is professional & business services, accounting for 29.0% of workers.
How residents commute
1.1%
Drive alone
3.5%
Carpool
74.9%
Public transit
9.7%
Work from home
21.3 min
Avg commute
Housing
$179,800$-21,800 vs state
Median home value
$1,030
Median rent
68.8%
Homeownership rate
118,329
Total housing units
90.4%
Occupied
9.6%
Vacant
31.2%
Renter-occupied
Social & access
92.7%
With health insurance
93.7%
With broadband internet
29.1%
Foreign-born
5.9%
Veterans (18+)
13.6%
With a disability
88.9%
Speak language other than English at home
Education
91.2%
High School+
32.6%
Bachelor's+
Largest cities in Indiana
Other counties in Indiana
Part of Indiana
Metro areas in Indiana
County rankings
Frequently Asked Questions
St. Joseph County, Indiana has a population of 272,574 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 5th-largest county in Indiana. Population density is 595 people per square mile.
The population of St. Joseph County has grown 2.6% since 2010 (266,799 → 273,744), a +0.18% annualized rate.
The median household income in St. Joseph County, Indiana is $64,885, with mean (average) household income of $89,361 and per-capita income of $35,714. 9.8% of residents live below the federal poverty level.
In St. Joseph County, the largest racial and ethnic groups are White (72.1%), Black or African American (12.6%), Hispanic or Latino (1.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in St. Joseph County, Indiana is 36.7 years. Residents are 51.0% female and 49.0% male.
The median home value in St. Joseph County is $179,800 and median monthly rent is $1,030. 68.8% of occupied housing units are owner-occupied. The county has 118,329 total housing units, 9.6% of which are vacant.
The largest employment sector in St. Joseph County, Indiana is professional, scientific, and management services, employing 29.0% of workers. The unemployment rate is 3.2%.
Indianapolis is among the largest cities associated with St. Joseph County, Indiana, with a population of 882,043.
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Statewide data for Indiana
Population, race, income, age, and trends across Indiana
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.