St. Joseph County's estimated 2026 population is 272,786 with a growth rate of -0.03% in the past year according to the most recent United States census data. St. Joseph County is the 5th largest county in Indiana. The 2010 population was 266,799 and has seen a growth of 2.24% since that time.
Data after 2023 is projected based on recent change
Overall: 36.7 years
Female: 37.7 years
Male: 35.6 years
There are 209,737 adults, (46,023 of whom are seniors) in St. Joseph County.
Female: 139,662 (51.2%)
Male: 133,378 (48.8%)
The racial composition of St. Joseph County includes 71.02% White, 12.46% Black or African American, 3.17% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 193,905 | 71.02% |
| Black or African American | 34,025 | 12.46% |
| Two or more races | 28,049 | 10.27% |
| Other race | 8,654 | 3.17% |
| Asian | 7,435 | 2.72% |
| Native American | 736 | 0.27% |
| Native Hawaiian or Pacific Islander | 236 | 0.09% |
St. Joseph County's average per capita income is $47,363. Household income levels show a median of $66,868. The poverty rate stands at 14.22%.
Name | Median | Mean |
|---|---|---|
| Married Families | $103,840 | $131,934 |
| Families | $87,495 | $113,517 |
| Households | $66,868 | $92,212 |
| Non Families | $40,765 | $57,526 |
Average Income
Median Household Income
Poverty Rate