Marlborough, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, Marlborough, Missouri had a total population of 2,157, the 260th largest village in Missouri, with a median household income of $50,300, which is 29% lower than the state average. The poverty rate is 4.6%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- An exceptionally low poverty rate of 4.6% — among the lowest in Missouri.
- Near full employment with an unemployment rate of just 0.7%.
Marlborough Quick Facts
How Marlborough 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 | 2,366 | 2,157 | -8.8% |
| Median household income | $47,011 | $50,300 | +7.0% |
| Median home value | $187,900 | $191,600 | +2.0% |
How Marlborough 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
Moderate diversity with one or two groups making up the majority.
State average: 40 | National average: 61
Education
Educational Attainment (Adults 25+)
Marlborough 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 Marlborough
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Seymour | 2,179 | $51,591 | $116,900 | 10.4% | 31.4% |
| Hanley Hills | 2,178 | $52,828 | $73,300 | 12.7% | 33.9% |
| Kahoka | 2,072 | $48,370 | $100,000 | 13.7% | 11.0% |
| Merriam Woods | 2,047 | $52,250 | $116,400 | 9.7% | 25.2% |
| Duquesne | 2,257 | $54,135 | $184,200 | 26.9% | 14.2% |
Population Overview
Marlborough is a small community located in Missouri, within St. Louis County. The total population is 2,157. It ranks as the 260th most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in Marlborough is 32.3 years. This is 17% lower than the state median of 39.0 years. Only 7.9% of residents are under 18, indicating fewer families with children.
Economy, Income & Housing
The median household income in Marlborough is $50,300. This is 29% lower than the state median of $70,702. It is also 38% lower than the national median of $80,734. The poverty rate stands at 4.6%. This is 63% 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 0.7%. This is 83% lower than the state rate of 4.0%. The median home value is $191,600. Housing costs are 17% lower than the state median of $230,300. The home-value-to-income ratio is 3.8x. 12.9% of occupied housing units are owner-occupied. This homeownership rate is 81% lower than the state average of 68.1%.
Race & Ethnicity
The largest racial or ethnic group in Marlborough is White (non-Hispanic), making up 72.9% of the population. Black or African American residents account for 11.2%. The Hispanic or Latino population is significantly higher than the state average (9.1% vs 5.2%). The Asian population is significantly higher than the state average (3.4% vs 2.1%).
Education
35.5% of residents aged 25 and older hold a bachelor's degree or higher. This is 10% 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 98.7%.
Data Sources & Methodology
All demographic data for Marlborough, 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 Marlborough, Missouri?
Marlborough, Missouri has a population of 2,157 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Marlborough, MO?
The median household income in Marlborough is $50,300, which is 38% lower than the national median of $80,734.
What is the poverty rate in Marlborough, MO?
The poverty rate in Marlborough is 4.6%. This means approximately 100 residents live below the federal poverty line.
What is the racial makeup of Marlborough, Missouri?
Marlborough's population is 72.9% White, 11.2% Black, 9.1% Hispanic/Latino, and 3.4% Asian.
What is the median home value in Marlborough, MO?
The median home value in Marlborough is $191,600. The home-value-to-income ratio is 3.8x.
How educated is Marlborough, Missouri?
35.5% of adults (25+) in Marlborough hold a bachelor's degree or higher, and 14.1% hold a graduate or professional degree.