HomeMissouriJefferson CountyByrnes Mill
Byrnes Mill, Missouri: commercial real estate data.
Byrnes Mill is a Census city of 3,189 people across 5.14 square miles of land, in Jefferson County. Median household income is $98,576, 81.3 percent of occupied homes are owned.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Byrnes Mill
What Byrnes Mill is
- Census place typecity
- Land area5.14 sq mi
- Water area0.12 sq mi
- Population per square mile of land620
- County holding the largest share of its areaJefferson County, 100.0 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Byrnes Mill
How many people live in Byrnes Mill
- Population3,189
- Median age37.9
- Population under 18799 plus or minus 307
- Share under 1825.1 percent plus or minus 9.6
- Population 65 and over497 plus or minus 170
- Share 65 and over15.6 percent plus or minus 5.3
- Households1,200
- Family households798
- Share of households that are families66.5 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Byrnes Mill
Income and work in Byrnes Mill
- Median household income$98,576 plus or minus $29,990
- Per capita income$41,320
- Civilian labor force1,479
- Employed1,334
- Unemployed145 plus or minus 124
- Unemployment rate9.8 percent plus or minus 8.3
- Adults 25 and over2,242
- Adults 25 and over with a high school diploma or higher93.4 percent
- Adults 25 and over with a bachelor degree or higher24.4 percent plus or minus 8.5
- Adults 25 and over with a graduate degree10.9 percent plus or minus 6.1
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Byrnes Mill
Housing in Byrnes Mill
- Housing units1,232
- Occupied units1,200
- Vacant units32 plus or minus 55
- Vacancy rate2.6 percent plus or minus 4.5
- Owner occupied976
- Renter occupied224 plus or minus 153
- Ownership rate81.3 percent
- Median owner-occupied home value$306,200 plus or minus $92,484
- Median gross rent, monthly$1,137
- Annual rent as a share of median income13.8 percent plus or minus 4.2
- Single family units782 plus or minus 159
- Share single family63.5 percent
- Units in buildings of two or more3 plus or minus 13
- Share in buildings of two or more0.2 percent plus or minus 1.1
- Mobile homes420 plus or minus 158
- Median year structure built1997
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Byrnes Mill
How Byrnes Mill gets to work
- Workers 16 and over who commute1,063
- Commuting under 15 minutes177 plus or minus 138
- Share commuting under 15 minutes16.7 percent plus or minus 12.5
- Commuting 30 minutes or more660 plus or minus 236
- Share commuting 30 minutes or more62.1 percent plus or minus 18.6
- Drove alone70.8 percent
- Carpooled6.8 percent plus or minus 6.1
- Public transport0.0 percent
- Walked0.0 percent
- Worked from home20.3 percent plus or minus 10.5
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Byrnes Mill
Flood risk in Byrnes Mill
- NFIP communityCity of Byrnes Mill
- NFIP community number290891
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date10/02/25
The City of Byrnes Mill participates in the National Flood Insurance Program as community 290891 and carries no Community Rating System class, so no CRS premium discount applies to it.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
Jefferson County, not Byrnes Mill
Jefferson County context, not Byrnes Mill figures
- Establishments in Jefferson County3,956
- Covered employment, Jefferson County49,458
- Average annual pay, Jefferson County$49,615
- Housing units permitted, Jefferson County811
Every figure in this section is published for Jefferson County as a whole and is not a measurement of Byrnes Mill.
All Jefferson County figures →
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Common questions
Byrnes Mill questions, answered from the record.
How many people live in Byrnes Mill, Missouri?
3,189, in 1,200 households. Byrnes Mill city covers 5.14 square miles of land, which is 620 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Byrnes Mill in?
Jefferson County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in Byrnes Mill?
$98,576. The median owner-occupied home is valued at $306,200. Median gross rent is $1,137 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Is Byrnes Mill in the National Flood Insurance Program?
Yes. Byrnes Mill appears in the FEMA Community Status Book as Byrnes Mill, city of, community 290891, with no Community Rating System class, so no CRS discount applies. Whether a specific parcel sits in a mapped special flood hazard area is an address level question the platform answers.
Are the county figures on this page Byrnes Mill figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for Jefferson County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of Byrnes Mill.
Is zoning published for Byrnes Mill?
No. Nothing on this page presents parcel level zoning.