Martinsburg, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, Martinsburg, Missouri had a total population of 522, the 509th largest town in Missouri, with a median household income of $34,503, which is 51% lower than the state average. The poverty rate is 13.8%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 51% below the state average, indicating significant economic challenges.
- Near full employment with an unemployment rate of just 0.9%.
Martinsburg Quick Facts
How Martinsburg 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 | 582 | 522 | -10.3% |
| Median household income | $31,735 | $34,503 | +8.7% |
How Martinsburg 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+)
Martinsburg Rankings in Missouri
Explore Missouri Rankings
Other Cities in Audrain County
Cities Similar to Martinsburg
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Bell City | 496 | N/A | $47,500 | 10.4% | 36.7% |
| Weaubleau | 521 | $30,686 | N/A | 20.4% | 35.7% |
| Hornersville | 531 | $38,750 | $55,800 | 11.2% | 34.8% |
| Bland | 476 | $34,423 | $92,400 | 3.1% | 23.9% |
| Breckenridge | 485 | $32,199 | N/A | 3.5% | 21.7% |
A note before these figures: with a population of 522, Martinsburg'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
Martinsburg is a small community located in Missouri, within Audrain County. The total population is 522. It ranks as the 509th most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in Martinsburg is 39.6 years. This is 2% higher than the state median of 39.0 years. With 32.2% of the population under 18, Martinsburg has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Martinsburg is $34,503. This is 51% lower than the state median of $70,702. It is also 57% lower than the national median of $80,734. The poverty rate stands at 13.8%. This is 10% higher than the state poverty rate of 12.6%. The unemployment rate is 0.9%. This is 78% lower than the state rate of 4.0%. 88.9% of occupied housing units are owner-occupied. This homeownership rate is 31% higher than the state average of 68.1%.
Race & Ethnicity
Martinsburg has a predominantly White (non-Hispanic) population, comprising 97.1% of all residents. Black or African American residents account for 1.1%. The Black or African American population (1.1%) is well below the state average of 10.9%.
Education
11.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 66% 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 98.0%.
Data Sources & Methodology
All demographic data for Martinsburg, 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 Martinsburg, Missouri?
Martinsburg, Missouri has a population of 522 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Martinsburg, MO?
The median household income in Martinsburg is $34,503, which is 57% lower than the national median of $80,734.
What is the poverty rate in Martinsburg, MO?
The poverty rate in Martinsburg is 13.8%. This means approximately 72 residents live below the federal poverty line.
What is the racial makeup of Martinsburg, Missouri?
Martinsburg's population is 97.1% White, 1.1% Black, 0.0% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Martinsburg, MO?
The Census Bureau does not publish a reliable median home value estimate for Martinsburg — there are too few owner-occupied homes in the ACS sample. The national median is $332,700.
How educated is Martinsburg, Missouri?
11.1% of adults (25+) in Martinsburg hold a bachelor's degree or higher, and 1.5% hold a graduate or professional degree.