St. John, Indiana Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of St. John, Indiana is 21,639 as of the 2023 American Community Survey, making it the 47th-largest city in Indiana. The median household income is $127,449, the median home value is $370,800, and the median age is 41.4.
The population has grown 62.8% since 2010 (14,896 → 24,250).
21,639
Population
1699
People / sq mi
$127,449
Median Income
$370,800
Median Home Value
St. John covers 12.7 sq mi of land at 1699 people per square mile.
About St. John, IN
St. John is a city in Indiana with a population of 21,639. It ranks #47 among cities in Indiana by population. The median age is 41.4, older than the national median. The population is 51.4% male and 48.6% female.
The median household income in St. John is $127,449, above the US median of $74,580. 0.5% of residents live below the federal poverty level. Home values sit at a median of $370,800, with monthly rent averaging $971. The homeownership rate of 98.1% is higher than the national rate of 64.8%.
Educational attainment in St. John reflects 42.9% of adults 25 and older holding a bachelor's degree or higher, above the national average of 34.3%. Roughly 11.4% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 32.4 minutes each way.
St. John town Population History (2010-2024)
The city of St. John town had a population of 14,896 in 2010 and 24,250 in 2024, a 62.8% growth over 14 years. The peak was 24,250 in 2024. Average annual growth rate: 3.56%.
24,250
Population (2024)
14,896
Population (2010)
24,250
Peak (2024)
3.56%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 14,896 |
| 2011 | 15,137 |
| 2012 | 15,287 |
| 2013 | 15,623 |
| 2014 | 16,091 |
| 2015 | 16,411 |
| 2016 | 16,718 |
| 2017 | 17,150 |
| 2018 | 17,990 |
| 2019 | 18,796 |
| 2020 | 20,522 |
| 2021 | 21,526 |
| 2022 | 22,833 |
| 2023 | 23,629 |
| 2024 | 24,250 |
Race & Ethnicity
| White | 84.4% |
| Black or African American | 2.8% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 0.9% |
| Two or More Races | 0.0% |
Economy & Income
$127,449
Median Household Income
$53,724
Per Capita Income
0.5%
Poverty Rate
2.1%
Unemployment Rate
Housing
$370,800
Median Home Value
$971
Median Rent
98.1%
Owner-Occupied
Education
94.7%
High School+
42.9%
Bachelor's+
Commute
1.8%
Drive Alone
80.5%
Public Transit
11.4%
Work From Home
32.4 min
Avg Commute
Community Profile
47.9%
Foreign Born
88.0%
Non-English at Home
4.9%
Veterans
11.4%
With Disability
97.9%
Health Insurance
97.1%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 22.9% |
| Manufacturing | 13.6% |
| Finance, Insurance & Real Estate | 12.2% |
| Construction | 10.0% |
| Retail Trade | 7.5% |
| Information | 7.0% |
| Education, Health Care & Social Services | 6.4% |
| Arts, Entertainment & Food Services | 3.9% |
| Public Administration | 3.8% |
| Transportation & Warehousing | 2.3% |
| Agriculture & Mining | 0.7% |
Largest cities in Indiana
Largest counties in Indiana
Part of Indiana
Metro areas in Indiana
City rankings
Frequently Asked Questions
St. John, Indiana has a population of 21,639 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 47th-largest city in Indiana.
The median household income in St. John, Indiana is $127,449, with 0.5% of residents living below the federal poverty level.
The median home value in St. John, Indiana is $370,800, with median monthly rent at $971 and a homeownership rate of 98.1%.
The median age in St. John, Indiana is 41.4 years. The population is 51.4% male and 48.6% female.
The population has grown 62.8% since 2010 (14,896 → 24,250).
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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.