St. John is a town located in Lake County, Indiana. St. John has a 2025 population of 25,182 . St. John is currently growing at a rate of 3.84% annually and its population has increased by 22.71% since the most recent census, which recorded a population of 20,522 in 2020.
The average household income in St. John is $154,088 with a poverty rate of 2.29%. The median age in St. John is 41.4 years: 39.9 years for males, and 43.1 years for females. For every 100 females there are 105.9 males.
Data after 2023 is projected based on recent change
The racial composition of St. John includes 84.42% White, 4.7% other race, and smaller percentages for Black or African American, Asian, Native American and multiracial populations.
White (84.42%)
Two or more races (5.6%)
Other race (4.7%)
Black or African American (2.76%)
Asian (2.43%)
Native American (0.09%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 18,267 | 84.42% |
| Two or more races | 1,212 | 5.6% |
| Other race | 1,018 | 4.7% |
| Black or African American | 598 | 2.76% |
| Asian | 525 | 2.43% |
| Native American | 19 | 0.09% |
Married
Widowed
Divorced
Separated
Never Married
St. John's average per capita income is $81,233. Household income levels show a median of $127,449. The poverty rate stands at 2.29%.
Name | Median | Mean |
|---|---|---|
| Married Families | $154,705 | - |
| Families | $150,068 | $168,062 |
| Households | $127,449 | $154,088 |
| Non Families | $52,250 | $79,730 |
Average Income
Median Household Income
Poverty Rate