St. Clair, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, St. Clair, Missouri had a total population of 4,789, the 152nd largest city in Missouri, with a median household income of $41,820, which is 41% lower than the state average. The poverty rate is 15.0%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 41% below the state average, indicating significant economic challenges.
- Only 9.5% of adults have a bachelor's degree, well below the national average of 35.7%.
- Unemployment rate of 9.8% is notably above the national average.
St. Clair Quick Facts
How St. Clair 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 | 4,767 | 4,789 | +0.5% |
| Median household income | $40,933 | $41,820 | +2.2% |
| Median home value | $134,100 | $157,700 | +17.6% |
How St. Clair 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 less diverse community where one racial or ethnic group represents a large majority.
State average: 40 | National average: 61
Education
Educational Attainment (Adults 25+)
St. Clair Rankings in Missouri
Explore Missouri Rankings
Other Cities in Franklin County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Washington | 15,130 | $79,173 | 7.9% | $231,800 |
| Union | 12,781 | $73,435 | 8.2% | $205,200 |
| Sullivan | 6,310 | $63,370 | 11.5% | $163,200 |
| New Haven | 3,302 | $71,306 | 10.1% | $192,400 |
| Gray Summit | 2,991 | $65,667 | 4.2% | $170,500 |
| Villa Ridge | 2,835 | $73,826 | 15.9% | $166,600 |
| Gerald | 1,368 | $61,458 | 14.5% | $150,800 |
| Lake St. Clair | 872 | $81,397 | 0.0% | $227,800 |
| Parkway | 624 | $44,479 | 15.5% | $192,900 |
| Oak Grove Village | 347 | $41,324 | 31.5% | $152,500 |
Cities Similar to St. Clair
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Butler | 4,668 | $42,151 | $145,400 | 13.0% | 24.7% |
| Salem | 4,677 | $43,923 | $115,000 | 15.1% | 11.1% |
| Eldon | 4,556 | $41,684 | $157,400 | 17.5% | 12.8% |
| Breckenridge Hills | 4,402 | $40,958 | $96,100 | 13.8% | 25.9% |
| Ste. Genevieve | 5,010 | $48,097 | $172,400 | 14.6% | 12.8% |
Population Overview
St. Clair is a small community located in Missouri, within Franklin County. The total population is 4,789. It ranks as the 152nd most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in St. Clair is 37.6 years. This is 4% lower than the state median of 39.0 years.
Economy, Income & Housing
The median household income in St. Clair is $41,820. This is 41% lower than the state median of $70,702. It is also 48% lower than the national median of $80,734. The poverty rate stands at 15.0%. This is 20% higher than the state poverty rate of 12.6%. The unemployment rate is 9.8%. This is 143% higher than the state rate of 4.0%. The median home value is $157,700. Housing costs are 32% lower than the state median of $230,300. The home-value-to-income ratio is 3.8x. 56.0% of occupied housing units are owner-occupied. This homeownership rate is 18% lower than the state average of 68.1%.
Race & Ethnicity
St. Clair has a predominantly White (non-Hispanic) population, comprising 89.6% of all residents. Hispanic or Latino residents account for 2.4%. The Black or African American population (0.6%) is well below the state average of 10.9%. The Hispanic or Latino population (2.4%) is well below the state average of 5.2%. The Asian population (0.3%) is well below the state average of 2.1%.
Education
9.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 71% 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 79.6%.
Data Sources & Methodology
All demographic data for St. Clair, 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. Clair, Missouri?
St. Clair, Missouri has a population of 4,789 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in St. Clair, MO?
The median household income in St. Clair is $41,820, which is 48% lower than the national median of $80,734.
What is the poverty rate in St. Clair, MO?
The poverty rate in St. Clair is 15.0%. This means approximately 712 residents live below the federal poverty line.
What is the racial makeup of St. Clair, Missouri?
St. Clair's population is 89.6% White, 0.6% Black, 2.4% Hispanic/Latino, and 0.3% Asian.
What is the median home value in St. Clair, MO?
The median home value in St. Clair is $157,700. The home-value-to-income ratio is 3.8x.
How educated is St. Clair, Missouri?
9.5% of adults (25+) in St. Clair hold a bachelor's degree or higher, and 2.4% hold a graduate or professional degree.