Weldon Spring, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, Weldon Spring, Missouri had a total population of 5,310, the 140th largest city in Missouri, with a median household income of $158,548, which is 124% higher than the state average. The poverty rate is 0.7%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 124% above the state average — one of the wealthiest communities in Missouri.
- An exceptionally low poverty rate of 0.7% — among the lowest in Missouri.
- 57.9% of adults hold a bachelor's degree or higher — top 10% in Missouri.
Weldon Spring Quick Facts
How Weldon Spring 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 | 5,291 | 5,310 | +0.4% |
| Median household income | $155,081 | $158,548 | +2.2% |
| Median home value | $523,300 | $544,300 | +4.0% |
How Weldon Spring 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+)
Weldon Spring Rankings in Missouri
Explore Missouri Rankings
Other Cities in St. Charles County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| O'Fallon | 93,801 | $110,443 | 5.4% | $326,200 |
| St. Charles | 71,508 | $85,937 | 7.3% | $298,700 |
| St. Peters | 59,092 | $91,637 | 5.7% | $269,900 |
| Wentzville | 47,061 | $112,394 | 5.4% | $331,300 |
| Lake St. Louis | 18,066 | $125,693 | 4.3% | $405,900 |
| Dardenne Prairie | 13,503 | $152,500 | 1.3% | $432,000 |
| Cottleville | 5,937 | $131,310 | 2.0% | $435,400 |
| St. Paul | 3,456 | $159,022 | 0.5% | $443,600 |
| Foristell | 1,096 | $116,581 | 1.7% | $431,700 |
| Josephville | 664 | $107,708 | 18.1% | $494,600 |
Cities Similar to Weldon Spring
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Glendale | 6,114 | $170,700 | $494,000 | 90.1% | 2.0% |
| Cottleville | 5,937 | $131,310 | $435,400 | 53.3% | 2.0% |
| Odessa | 5,620 | $100,022 | $238,200 | 31.2% | 6.1% |
| Herculaneum | 5,071 | $93,438 | $234,300 | 23.0% | 5.6% |
| Imperial | 5,488 | $90,028 | $228,700 | 21.4% | 11.1% |
Population Overview
Weldon Spring is a small city located in Missouri, within St. Charles County. The total population is 5,310. It ranks as the 140th most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in Weldon Spring is 52.2 years. This is 34% higher than the state median of 39.0 years. 15.7% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.
Economy, Income & Housing
The median household income in Weldon Spring is $158,548. This is 124% higher than the state median of $70,702. It is also 96% higher than the national median of $80,734. The poverty rate stands at 0.7%. This is 94% lower than the state poverty rate of 12.6%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 4.2%. This is 5% higher than the state rate of 4.0%. The median home value is $544,300. Housing costs are 136% higher than the state median of $230,300. The home-value-to-income ratio is 3.4x. 83.4% of occupied housing units are owner-occupied. This homeownership rate is 22% higher than the state average of 68.1%.
Race & Ethnicity
Weldon Spring has a predominantly White (non-Hispanic) population, comprising 93.9% of all residents. Asian residents account for 3.8%. The Black or African American population (0.8%) is well below the state average of 10.9%. The Asian population is significantly higher than the state average (3.8% vs 2.1%).
Education
57.9% of residents aged 25 and older hold a bachelor's degree or higher. This places Weldon Spring in the top 10% of all cities in the state for educational attainment. This is 79% higher 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 98.4%. Notably, 25.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Weldon Spring, 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 Weldon Spring, Missouri?
Weldon Spring, Missouri has a population of 5,310 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Weldon Spring, MO?
The median household income in Weldon Spring is $158,548, which is 96% higher than the national median of $80,734.
What is the poverty rate in Weldon Spring, MO?
The poverty rate in Weldon Spring is 0.7%. This means approximately 39 residents live below the federal poverty line.
What is the racial makeup of Weldon Spring, Missouri?
Weldon Spring's population is 93.9% White, 0.8% Black, 0.0% Hispanic/Latino, and 3.8% Asian.
What is the median home value in Weldon Spring, MO?
The median home value in Weldon Spring is $544,300. The home-value-to-income ratio is 3.4x.
How educated is Weldon Spring, Missouri?
57.9% of adults (25+) in Weldon Spring hold a bachelor's degree or higher, and 25.9% hold a graduate or professional degree.