St. John, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, St. John, Missouri had a total population of 6,527, the 119th largest city in Missouri, with a median household income of $53,755, which is 24% lower than the state average. The poverty rate is 15.4%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing is very affordable with a home-value-to-income ratio of just 2.0x.
St. John Quick Facts
How St. John Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 6,562 | 6,527 | -0.5% |
| Median household income | $50,429 | $53,755 | +6.6% |
| Median home value | $96,900 | $106,300 | +9.7% |
How St. John Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A diverse community with significant representation from multiple racial and ethnic groups.
State average: 40 | National average: 61
Education
Educational Attainment (Adults 25+)
St. John Rankings in Missouri
Explore Missouri Rankings
Other Cities in St. Louis County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Florissant | 51,773 | $65,318 | 10.1% | $148,800 |
| Chesterfield | 49,574 | $133,037 | 3.9% | $472,500 |
| Oakville | 35,333 | $106,362 | 6.4% | $318,600 |
| Wildwood | 35,133 | $161,060 | 2.2% | $495,800 |
| University City | 34,685 | $80,694 | 14.5% | $306,700 |
| Ballwin | 31,279 | $124,626 | 4.8% | $377,100 |
| Mehlville | 29,805 | $67,071 | 7.8% | $218,400 |
| Kirkwood | 29,363 | $121,270 | 5.3% | $451,400 |
| Maryland Heights | 27,880 | $86,436 | 4.7% | $227,000 |
| Hazelwood | 25,114 | $55,908 | 15.9% | $167,400 |
Cities Similar to St. John
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| De Soto | 6,470 | $52,500 | $160,700 | 11.5% | 13.1% |
| Pevely | 6,055 | $56,000 | $219,600 | 18.4% | 17.9% |
| Bonne Terre | 6,683 | $46,179 | $153,000 | 14.4% | 28.3% |
| Sullivan | 6,310 | $63,370 | $163,200 | 18.9% | 11.5% |
| Richmond | 5,959 | $59,556 | $142,600 | 13.2% | 16.3% |
Population Overview
St. John is a small city located in Missouri, within St. Louis County. The total population is 6,527. It ranks as the 119th most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in St. John is 36.0 years. This is 8% lower than the state median of 39.0 years.
Economy, Income & Housing
The median household income in St. John is $53,755. This is 24% lower than the state median of $70,702. It is also 33% lower than the national median of $80,734. The poverty rate stands at 15.4%. This is 22% higher than the state poverty rate of 12.6%. The unemployment rate is 6.3%. This is 57% higher than the state rate of 4.0%. The median home value is $106,300. Housing costs are 54% lower than the state median of $230,300. With a home-value-to-income ratio of just 2.0x, St. John is one of the most affordable housing markets in the area. 58.6% of occupied housing units are owner-occupied. This homeownership rate is 14% lower than the state average of 68.1%.
Race & Ethnicity
The largest racial or ethnic group in St. John is White (non-Hispanic), making up 48.1% of the population. Black or African American residents account for 36.3%. The Black or African American population is significantly higher than the state average (36.3% vs 10.9%). The Hispanic or Latino population is significantly higher than the state average (12.1% vs 5.2%). The Asian population (0.4%) is well below the state average of 2.1%.
Education
19.9% of residents aged 25 and older hold a bachelor's degree or higher. This is 39% lower than the state rate of 32.4%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 86.8%.
Data Sources & Methodology
All demographic data for St. John, Missouri is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Missouri state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 1,062 Census-designated places in Missouri. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of St. John, Missouri?
St. John, Missouri has a population of 6,527 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in St. John, MO?
The median household income in St. John is $53,755, which is 33% lower than the national median of $80,734.
What is the poverty rate in St. John, MO?
The poverty rate in St. John is 15.4%. This means approximately 995 residents live below the federal poverty line.
What is the racial makeup of St. John, Missouri?
St. John's population is 48.1% White, 36.3% Black, 12.1% Hispanic/Latino, and 0.4% Asian.
What is the median home value in St. John, MO?
The median home value in St. John is $106,300. The home-value-to-income ratio is 2.0x.
How educated is St. John, Missouri?
19.9% of adults (25+) in St. John hold a bachelor's degree or higher, and 6.4% hold a graduate or professional degree.