West Alton, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, West Alton, Missouri had a total population of 467, the 536th largest city in Missouri, with a median household income of $111,500, which is 58% higher than the state average. The poverty rate is 1.7%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 58% above the state average — one of the wealthiest communities in Missouri.
- An exceptionally low poverty rate of 1.7% — among the lowest in Missouri.
- Housing is very affordable with a home-value-to-income ratio of just 1.4x.
West Alton Quick Facts
How West Alton 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 | 511 | 467 | -8.6% |
| Median household income | $128,438 | $111,500 | -13.2% |
| Median home value | $156,300 | $153,100 | -2.0% |
How West Alton 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+)
West Alton 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 |
| Weldon Spring | 5,310 | $158,548 | 0.7% | $544,300 |
| St. Paul | 3,456 | $159,022 | 0.5% | $443,600 |
| Foristell | 1,096 | $116,581 | 1.7% | $431,700 |
Cities Similar to West Alton
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Asbury | 459 | N/A | $117,500 | 21.7% | 4.8% |
| New Melle | 452 | $114,375 | $397,800 | 48.4% | 4.4% |
| Bell City | 496 | N/A | $47,500 | 10.4% | 36.7% |
| Shoal Creek Drive | 485 | $99,583 | $136,300 | 20.1% | 6.6% |
| Wilbur Park | 491 | $91,667 | $204,900 | 48.0% | 11.2% |
A note before these figures: with a population of 467, West Alton's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
West Alton is a small community located in Missouri, within St. Charles County. The total population is 467. It ranks as the 536th most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in West Alton is 36.5 years. This is 6% lower than the state median of 39.0 years. With 30.4% of the population under 18, West Alton has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in West Alton is $111,500. This is 58% higher than the state median of $70,702. It is also 38% higher than the national median of $80,734. The poverty rate stands at 1.7%. This is 86% 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 5.0%. This is 24% higher than the state rate of 4.0%. The median home value is $153,100. Housing costs are 34% lower than the state median of $230,300. With a home-value-to-income ratio of just 1.4x, West Alton is one of the most affordable housing markets in the area. 85.7% of occupied housing units are owner-occupied. This homeownership rate is 26% higher than the state average of 68.1%.
Race & Ethnicity
West Alton has a predominantly White (non-Hispanic) population, comprising 96.2% of all residents. Black or African American residents account for 2.8%. The Black or African American population (2.8%) is well below the state average of 10.9%.
Education
22.6% of residents aged 25 and older hold a bachelor's degree or higher. This is 30% 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 92.8%.
Data Sources & Methodology
All demographic data for West Alton, 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 West Alton, Missouri?
West Alton, Missouri has a population of 467 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in West Alton, MO?
The median household income in West Alton is $111,500, which is 38% higher than the national median of $80,734.
What is the poverty rate in West Alton, MO?
The poverty rate in West Alton is 1.7%. This means approximately 8 residents live below the federal poverty line.
What is the racial makeup of West Alton, Missouri?
West Alton's population is 96.2% White, 2.8% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in West Alton, MO?
The median home value in West Alton is $153,100. The home-value-to-income ratio is 1.4x.
How educated is West Alton, Missouri?
22.6% of adults (25+) in West Alton hold a bachelor's degree or higher, and 4.6% hold a graduate or professional degree.