St. John is located in Lake County, Indiana. St. John has a 2025 population of 72,145 . St. John is currently growing at a rate of 0.79% annually and its population has increased by 4.35% since the most recent census, which recorded a population of 69,137 in 2020.
The average household income in St. John is $124,740 with a poverty rate of 6.02%. The median age in St. John is 44 years: 42.6 years for males, and 45.5 years for females. For every 100 females there are 96.1 males.
Data after 2023 is projected based on recent change
The racial composition of St. John includes 80.78% White, 5.2% Black or African American, and smaller percentages for Asian, other race, Native American and multiracial populations.
White (80.78%)
Two or more races (9.08%)
Black or African American (5.2%)
Asian (2.5%)
Other race (2.25%)
Native American (0.18%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 56,376 | 80.78% |
| Two or more races | 6,338 | 9.08% |
| Black or African American | 3,628 | 5.2% |
| Asian | 1,745 | 2.5% |
| Other race | 1,573 | 2.25% |
| Native American | 129 | 0.18% |
Married
Widowed
Divorced
Separated
Never Married
St. John's average per capita income is $61,203. Household income levels show a median of $98,967. The poverty rate stands at 6.02%.
Name | Median | Mean |
|---|---|---|
| Married Families | $129,435 | - |
| Families | $116,243 | $141,961 |
| Households | $98,967 | $124,740 |
| Non Families | $57,188 | $71,759 |
Average Income
Median Household Income
Poverty Rate