Byrnes Mill, Missouri Demographics & Population 2026
During the 2020–2024 ACS period, Byrnes Mill, Missouri had a total population of 3,189, the 194th largest city in Missouri, with a median household income of $98,576, which is 39% higher than the state average. The poverty rate is 21.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 39% above the state average — one of the wealthiest communities in Missouri.
- Unemployment rate of 9.8% is notably above the national average.
Byrnes Mill Quick Facts
How Byrnes Mill 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 | 3,168 | 3,189 | +0.7% |
| Median household income | $87,663 | $98,576 | +12.4% |
| Median home value | $249,500 | $306,200 | +22.7% |
How Byrnes Mill 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+)
Byrnes Mill Rankings in Missouri
Explore Missouri Rankings
Other Cities in Jefferson County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Arnold | 20,956 | $78,370 | 8.2% | $220,000 |
| Festus | 13,201 | $73,532 | 17.1% | $223,600 |
| Murphy | 8,285 | $72,233 | 10.2% | $184,700 |
| De Soto | 6,470 | $52,500 | 13.1% | $160,700 |
| Pevely | 6,055 | $56,000 | 17.9% | $219,600 |
| Barnhart | 5,785 | $95,811 | 4.9% | $229,200 |
| Imperial | 5,488 | $90,028 | 11.1% | $228,700 |
| Herculaneum | 5,071 | $93,438 | 5.6% | $234,300 |
| Crystal City | 4,718 | $72,598 | 11.4% | $185,800 |
| High Ridge | 3,714 | $70,917 | 7.2% | $172,200 |
Cities Similar to Byrnes Mill
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Buckner | 2,914 | $87,350 | $197,600 | 22.6% | 12.1% |
| Oronogo | 2,804 | $91,563 | $188,500 | 31.0% | 5.0% |
| Clever | 3,030 | $78,366 | $200,000 | 25.2% | 5.9% |
| Country Club | 2,935 | $81,042 | $205,000 | 28.2% | 6.8% |
| New Haven | 3,302 | $71,306 | $192,400 | 28.9% | 10.1% |
Population Overview
Byrnes Mill is a small community located in Missouri, within Jefferson County. The total population is 3,189. It ranks as the 194th most populous out of 1,062 Census-designated places in Missouri.
Age Demographics
The median age in Byrnes Mill is 37.9 years. This is 3% lower than the state median of 39.0 years.
Economy, Income & Housing
The median household income in Byrnes Mill is $98,576. This is 39% higher than the state median of $70,702. It is also 22% higher than the national median of $80,734. The poverty rate stands at 21.1%. This is 68% higher than the state poverty rate of 12.6%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 9.8%. This is 144% higher than the state rate of 4.0%. The median home value is $306,200. Housing costs are 33% higher than the state median of $230,300. The home-value-to-income ratio is 3.1x. 81.3% of occupied housing units are owner-occupied. This homeownership rate is 19% higher than the state average of 68.1%.
Race & Ethnicity
Byrnes Mill has a predominantly White (non-Hispanic) population, comprising 85.5% of all residents. Black or African American residents account for 1.9%. The Black or African American population (1.9%) is well below the state average of 10.9%. The Hispanic or Latino population (0.4%) is well below the state average of 5.2%.
Education
24.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 25% 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 93.3%.
Data Sources & Methodology
All demographic data for Byrnes Mill, 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 Byrnes Mill, Missouri?
Byrnes Mill, Missouri has a population of 3,189 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Byrnes Mill, MO?
The median household income in Byrnes Mill is $98,576, which is 22% higher than the national median of $80,734.
What is the poverty rate in Byrnes Mill, MO?
The poverty rate in Byrnes Mill is 21.1%. This means approximately 674 residents live below the federal poverty line.
What is the racial makeup of Byrnes Mill, Missouri?
Byrnes Mill's population is 85.5% White, 1.9% Black, 0.4% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Byrnes Mill, MO?
The median home value in Byrnes Mill is $306,200. The home-value-to-income ratio is 3.1x.
How educated is Byrnes Mill, Missouri?
24.4% of adults (25+) in Byrnes Mill hold a bachelor's degree or higher, and 10.9% hold a graduate or professional degree.