MOMap-doton-Byrnes Mill, 2004
Byrnes Mill’s story
177 years in pictures
Census counts: 1,578 in 1990, 3,173 in 2020. The archive holds 1 old photo or paper going back to 2004 and 5 maps from 1931 on.
- 1849Byrnes Mill is founded
Byrnes MillMO
A town of 3,183, founded in 1849.
Population
3,183
2025 Census estimate · +0.3% since 2020
Typical home
$356K
+3.2% in a year
Household income
$99K
median
Median age
37.9
years
Jobs based here
246
A commuter town
TownGrade
D
#209 of 247 in MO
Is Byrnes Mill a good place to live?
Byrnes Mill grades D overall, 209th among Missouri's 247 graded towns. What it does well: homes are within reach, about $356K for a typical one, or 4.4 years of the St. Louis metro’s $80K median household income. Byrnes Mill’s average trip to work is 38 minutes, above both Missouri’s towns (22 minutes) and U.S. towns (25 minutes). Only 10 of Missouri’s 419 towns score lower on hazard risk. Most errands need a car: it is less walkable than 88% of U.S. towns.
A growing town
Byrnes Mill has grown 14% since 2010
2,781 counted in 2010 and 3,173 in 2020; an estimated 3,183 in 2025.
Growth has leveled off: within 1% of 2020, after 14.1% in the decade before.
U.S. Census 2010 & 2020 counts · Census Bureau estimate, July 1, 2025
How Byrnes Mill grades
Each subject compared with towns across the country (schools within Missouri), ordered by how far Byrnes Mill is from typical.
Hazard riskinland flooding tops the listDOpen →WalkabilityEPA walkability 5.7 of 20; 2.9% of households have no car; 0% of workers walk, bike or ride transitDOpen →HealthSSM St. Clare Health Center 8.1 miles awayCOpen →SafetyC+Open →Jobs & income$99K median household incomeC+Open →SchoolsBehind 54% of Missouri districts on tests and graduationB−Open →Cost of livingB−Open →
Character Graded, but not part of the overall grade.
Outdoors1% conserved landC−Open →HistoryC+Open →Civic life1.8 community nonprofits per 1,000 residentsB−Open →
Described, not graded Taste, not quality: snow or an older crowd is neither good nor bad.
Climate–Open →Housing market3 days on market–Open →Who lives hereMedian age 37.9; 24% of adults have a four-year degree–Open →
How TownRatings grades towns →
Nearby attractions
All 60 attractions →Cahokia and 55 more within 40 miles
Museums, parks, gardens and other places to visit around Byrnes Mill. Close and well known come first.
Big draw31 mi State parkCahokia
8 mi Theme parkMid America Adventure
Big draw25 mi Stadium & arenaThe Dome at America's Center
24 mi Stadium & arenaBusch Stadium
24 mi National ParkGateway Arch National Park2.2M visitors a year
32 mi LandmarkMonks MoundSources: National Park Service · ski areas © OpenSkiMap / OpenStreetMap contributors · Wikidata · Wikipedia readership · photos via Wikimedia Commons
Photo credits
Cahokia: Thank You (24 Millions ) views, CC BY 2.0 · Mid America Adventure: Chris Hagerman from New Port Richey, FL, US, CC BY 2.0 · The Dome at America's Center: Paul Sableman, CC BY 2.0 · Busch Stadium: Lee Ann Ratledge, CC BY 4.0 · Gateway Arch National Park: Daniel Schwen, CC BY-SA 4.0 · Monks Mound: Skubasteve834, CC BY-SA 3.0
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Getting set up
The full setup list →Moving to Byrnes Mill: who provides what
Who provides power, water and the rest in Byrnes Mill, and how to reach them.
PowerUnion Electric13.3¢/kWh · EIA 2025HIFLD · EIA
WaterJefferson County Pwsd 6No health-based violations in 5 years · EPAEPA
Internet7 providers100% of addresses get 100/20 MbpsFCC
Trash & dumpNot on file yetWe don’t have Byrnes Mill’s trash rules yet
Register to voteOnlineIn Missouri you can register online until 27 days before Election Day, in person until 27 days before Election Day, or by mail (postmarked 27 days before).vote.govWho runs elections hereJeffersonJefferson County; contacts on the Handbook page.FVAP, Aug 2019
ZIP codes63051, 63025, 6304963051 86% · 63025 10% · 63049 3%Census 2020
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Nov 18, 2024.
The data
Ordered by what stands out in Byrnes Mill.
Byrnes Mill looks healthier within Missouri than nationally, but it carries more natural-hazard risk than most of Missouri (mostly inland flooding) and has little public open land.
Natural hazardsHazard risk grade D
The FEMA risk score in Byrnes Mill is higher than in the typical Missouri or U.S. town
FEMA rates its natural-hazard risk higher than 98% of Missouri towns, with expected losses of about $1,403 per resident a year; that rating is what its D for hazard risk is built on.
Byrnes Mill’s FEMA risk score is 90 of 100. Since 2008, 7 flood insurance claims have been paid out in Byrnes Mill.
90risk score of 100
FEMA risk score
Inland floodingTornadoesEarthquakes
7
paid flood claims since 2008
3
federal disasters paid out here
FEMA flood insurance claims · FEMA National Risk Index · OpenFEMA
HousingCost of living grade B−
Byrnes Mill earns a B− for cost of living
81% of households own their home in Byrnes Mill. The typical Byrnes Mill home is worth about $356,000, up 3.2% in a year, 34% above the Missouri typical home.
$356KZillow home value
| Byrnes Mill | Missouri towns | U.S. towns | |
|---|---|---|---|
| Households that own their home | 81% | 64% | 73% |
| Median rent | $1,137 a month | $970 a month | $1,185 a month |
Typical home value
Byrnes Mill$356K
Missouri$265K
Market temperature
3
days on market
104.2%
sale-to-list price
+3.2%
value change, 1 year
7
homes sold in May
Census ACS, 2020–24 · Zillow Home Value Index · Redfin Data Center
Work & commuteJobs & income grade C+
Byrnes Mill stands out in Missouri and nationally, with fewer of its working residents who work locally
Byrnes Mill has 246 jobs for its 1,423 working residents: even if every job went to a resident, most would still commute out. The average commute takes 38.1 minutes, against 23.5 across Missouri.
0.4% of Byrnes Mill working residents work locally. Since 2013, Byrnes Mill has added 56 jobs, to 246 in 2023. 21% of Byrnes Mill residents live below the poverty line.
0%work in town
| Byrnes Mill | Missouri towns | U.S. towns | |
|---|---|---|---|
| Below the poverty line | 21% | 14% | 9.6% |
| Working residents who work in town | 0.4% | 13% | 8% |
| Median household income | $99,000 | $62,000 | $80,000 |
Where working residents work
In Byrnes Mill0%
St. Louis12%
Fenton6%
Chesterfield5%
Clayton4%
17 mi
median commute distance
246
jobs based in Byrnes Mill
A commuter town
jobs vs. working residents
D
Walkability grade: more walkable than 12% of U.S. towns
Census LEHD 2023 · ACS
HealthC
Residents of Byrnes Mill are less healthy than 69% of U.S. towns
Within Missouri it is healthier than 52% of the 247 graded towns: much of Missouri scores lower on these measures. Against the 8,779 U.S. towns with household incomes like Byrnes Mill’s, it is less healthy than 90%, so it trails even them.
Byrnes Mill tracks Missouri closely on all 32 CDC measures.
31%healthier than U.S. townsCHealth Grade
| Byrnes Mill | Missouri towns | U.S. towns | |
|---|---|---|---|
| Feel lonely (CDC PLACES) | 29% | 32% | 33% |
| Obesity (CDC PLACES) | 41% | 38% | 35% |
| Get no exercise (CDC PLACES) | 28% | 30% | 25% |
| Smoke cigarettes (CDC PLACES) | 17% | 17% | 14% |
32 measures vs. Missouri
0 better32 too close to call0 worse
SSM St. Clare Health Center
8.1 mi away · emergency room
1 of 3
care shortages: primary care
52nd
percentile among MO towns
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
Climate
Four seasons and hot summers in Byrnes Mill
Byrnes Mill has chilly winters and warm summers. July afternoons reach 88°, January nights drop to 23° and about 10 inches of snow falls in a winter.
10″snow a winter
Typical low → high °F
Winter26–44°
Spring45–67°
Summer66–87°
Fall47–68°
Oct 26
typical first frost
Apr 9
typical last frost
+1.0°
vs. the 20th-century average
NOAA U.S. Climate Normals, 1991–2020
SafetyC+
Byrnes Mill sees more crime per resident than 63% of U.S. towns
Reported crimes fell from 46 to 19 over the last three FBI years, a drop beyond ordinary year-to-year swings.
37%of U.S. towns report more crimeC+Safety Grade
Violent crime per 1,000 residents
Byrnes Mill1.6
Missouri4.3
U.S.3.3
Property crime per 1,000 residents
Byrnes Mill4.4
Missouri16.9
U.S.15.5
37th
percentile among U.S. towns we grade
47th
percentile among MO towns
5
violent crimes reported in 2025
14
property crimes reported in 2025
FBI crime data, 2025 · crimes reported to police
Who lives here
An age mix much like Missouri’s
No broad age group is more than 4 points off the Missouri average. 25% of adults 25 and older have a bachelor’s degree or more, vs 32% across Missouri.
37.9median age · MO 39
| Byrnes Mill | Missouri towns | U.S. towns | |
|---|---|---|---|
| Aged 65 or older | 16% | 17% | 18% |
| Median age | 37.9 years | 38.5 years | 40.5 years |
| Bachelor’s degree or more, 25+ | 25% | 22% | 29% |
Byrnes MillMissouriUnited States
Ages · share of residents
16%
Education · adults 25 and older
No diploma7%
High school28%
Some college27%
Associate’s14%
Bachelor’s14%
Graduate11%
Women and men · all residents
47% women, 53% men
That’s an even split within the survey’s margin of ±6.6 points. Across Missouri, 50.7% of residents are women. Among residents 18 to 24, 98% are women (MO 49%).
| Byrnes Mill | MO | U.S. | |
|---|---|---|---|
| Under 10 | 11.6% | 11.9% | 11.6% |
| 10 to 17 | 13.4% | 10.4% | 10.3% |
| 18 to 24 | 4.6% | 9.1% | 9.1% |
| 25 to 34 | 16.3% | 13.2% | 13.7% |
| 35 to 44 | 14.1% | 12.8% | 13.2% |
| 45 to 54 | 14.5% | 11.6% | 12.2% |
| 55 to 64 | 9.8% | 13% | 12.7% |
| 65 to 74 | 13.2% | 10.6% | 10.2% |
| 75 and older | 2.4% | 7.3% | 7% |
| No diploma | 6.6% | 8.1% | 10.4% |
| High school | 27.8% | 30.2% | 26% |
| Some college | 26.8% | 20.8% | 19.1% |
| Associate’s | 14.4% | 8.4% | 8.8% |
| Bachelor’s | 13.6% | 19.8% | 21.6% |
| Graduate | 10.9% | 12.6% | 14.1% |
U.S. Census Bureau · ACS 2020-2024 5-year estimates · in a town of 3,200, single groups can be off by several points
OutdoorsC−
Byrnes Mill has set aside 0.6% of its land for conservation
Just 20 of its 3,331 acres are conserved, so there is little public open land in Byrnes Mill itself; its outdoors grade is C−.
0.0 miles of trail in 1 park or preserve.
0.6%conserved
0.6%
conserved · 20 of 3,331 acres
0.0 mi
of trails · 0 per sq mi
| Biggest places to walk | Trails | Acres |
|---|---|---|
| 1. Brynes Mill Park | — | 14 |
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
Keep exploring
Everything we know about Byrnes Mill
19pages on Byrnes Mill
The big questions
SchoolsB−Behind 54% of MO districtsSafetyC+1.6 violent crimes per 1,000 residents (2025)HealthCBetter than MO on 0 of 32 CDC measuresCost of livingB−$356K typical home · up 3.2% in a yearWork & commuteC+$99K median household income · 246 jobs hereNatural hazardsDFEMA risk higher than 90% of U.S. communities · inland flooding
Out and about
The story
Day to day
After high school
Colleges nearby
4 within 15 miles of the center of Byrnes Mill
St Louis College of Health Careers-FentonUniversity or college · Private for-profit · Fenton9.2 miJefferson CollegeCommunity college · Public · Hillsboro12.4 mi$5,250 in-state tuitionLogan UniversityUniversity or college · Private nonprofit · Chesterfield13.4 mi$9,000 tuition
About 2 of every 100 Byrnes Mill residents are enrolled in college, against 6 across Missouri.
A commuter town
100% of working residents leave Byrnes Mill for work
Where Byrnes Mill’s working residents go each day. Line width shows the share.
246jobs based in Byrnes Mill
0%of working residents work in town
17 mimedian commute distance
Census LEHD 2023
About Byrnes Mill
City in Missouri, United States
Byrnes Mill is a city in northern Jefferson County, Missouri, United States. The population was 3,173 at the 2020 census.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
- Area
- 5.3 sq mi
- Elevation
- 459 ft
- Area code
- 636
Byrnes Mill’s neighbors
One town shares a border with Byrnes Mill.
ScotsdaleByrnes Mill
How the neighbors grade
| Town | MO rank | Overall | Cost | Safety | Schools | Health |
|---|---|---|---|---|---|---|
| Byrnes Mill | #209 | D | B− | C+ | B− | C |
| Scotsdale | — | — | — | — | — | — |
Scotsdale isn’t graded (fewer than 1,000 residents, or not enough data). Compare Byrnes Mill with a neighbor →
Questions about Byrnes Mill
Short answers, built from the data on this page.
Is Byrnes Mill, MO a good place to live?
Byrnes Mill grades D overall, better than 14% of U.S. towns and #209 of 247 in Missouri. It grades C for health, C+ for safety and B− for schools. Hazard risk is its weak spot, with a D.
Is Byrnes Mill, MO expensive?
Louis, MO-IL metro area). Cost of living, which also weighs rents, property taxes and how many households pay 30% or more of their income for housing, grades B−.