St. Joseph County's 2026 population is estimated at 61,389, reflecting a 0.18% growth rate over the past year (World Population Review estimate based on U.S. Census Bureau data). St. Joseph County is the 33rd largest county in Michigan. The 2010 population was 61,288 and has grown 0.16% since 2010.
Data after 2023 is projected based on recent change
Overall: 39.9 years
Female: 40.9 years
Male: 38.9 years
There are 46,168 adults, (11,403 of whom are seniors) in St. Joseph County.
Female: 30,321 (49.7%)
Male: 30,648 (50.3%)
The racial composition of St. Joseph County includes 85.12% White, and smaller percentages for other race, Black or African American, Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 51,897 | 85.12% |
| Two or more races | 5,744 | 9.42% |
| Other race | 1,410 | 2.31% |
| Black or African American | 1,296 | 2.13% |
| Asian | 397 | 0.65% |
| Native American | 209 | 0.34% |
| Native Hawaiian or Pacific Islander | 16 | 0.03% |
St. Joseph County 's average per capita income is $42,718. Household income levels show a median of $66,425. The poverty rate stands at 11.41%.
| Name | Median ↓ | Mean |
|---|---|---|
| Married Families | $94,939 | $106,111 |
| Families | $81,491 | $94,635 |
| Households | $66,425 | $81,433 |
| Non Families | $36,611 | $50,798 |
Average Income
Median Household Income
Poverty Rate