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Reconstructed Ft. Zumwalt 2017

O'FallonMO

A city of 93,801, settled in 1856. Public schools that outperform most of Missouri.

8 bordering townsMap →
Photo: Classiv · CC BY-SA 4.0
Population
93,801
+15.1% since 2010
Typical home
$380K
+1.7% in a year
Household income
$110K
median
Median age
38.4
years
Jobs based here
38,430
Balanced

What makes O'Fallon stand out

The 3 things O'Fallon does most differently from other towns.

Picked automatically from the data
A growing town

O'Fallon has grown 15.1% since 2010

79,329 people in 2010; 93,801 today.

79,3292010
91,3162020
93,801Today

U.S. Census 2010 & 2020 · ACS

O'Fallon’s report card

See the data ↓

Now in O'Fallon

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The data

Ordered by what stands out in O'Fallon. Another town gets a different order.

Schools

O'Fallon’s public schools outperform 89% of Missouri districts

The public schools O'Fallon’s kids attend, from kindergarten through graduation, outperform 89% of Missouri’s districts on state tests and graduation. Among towns with similar incomes, they rank near the top.

ASchool Grade
SchoolGradesStudentsGrade
Crossroads Elem.K–5757A
Progress South Elem.K–5642A
Discovery Ridge ElementaryPK–5590A
Westhoff Elem.K–5534A−
Twin Chimneys Elem.K–5488A
Dardenne Elem.K–5445B+
NCES · EDFacts · graded within MO on state tests and graduationAll 28 schools →
Outdoors

2.9% of O'Fallon is conserved land

16 miles of trails across 16 parks and preserves.

2.9%conserved
Map of O'Fallon: conserved land, trails and the top places to walk
Green: conserved land · dashed: trails · numbers: the places below
2.9%
conserved · 570 of 19,713 acres
16 mi
of trails · 0.5 per sq mi
#79
most conserved land in MO
#33
most walkable in MO
Biggest places to walkTrailsAcres
1. Civic Park0.9 mi17
2. Boardwalk Springs Park0.5 mi5
3. Dames Park0.4 mi54
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-USParks & trails →
Work & commute

About one in seven working residents works right in O'Fallon

Most working residents leave O'Fallon for work: only 15% work in town. The top destinations are St. Peters (7%), St. Louis (6%) and Chesterfield (6%). Half commute less than 15 miles.

15%work in town

Where working residents work

In O'Fallon15%
St. Peters7%
St. Louis6%
Chesterfield6%
St. Charles6%
15 mi
median commute distance
38,430
jobs based in O'Fallon
Balanced
jobs vs. working residents
Census LEHD 2023 · ACSCommute map →
Health

Healthier than 75% of U.S. towns

O'Fallon beats the Missouri average on 17 of 32 CDC measures and trails it on 0.

A−Health Grade
32 measures vs. Missouri
17 better15 too close to call0 worse
What stands outO'FallonMO
Fewer older adults who have lost all their teeth10.2%15.8%
Fewer adults facing food insecurity9%13.7%
Ssm St. Joseph Hospital West
3.4 mi away · emergency room
1 of 3
care shortages: mental health
88th
percentile among MO towns
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSAFull health report →
Housing

A typical O'Fallon home is worth about $380K

The typical O'Fallon home is worth about $380,000, up 1.7% in a year, 42% above the Missouri typical home.

$380KZillow home value

Typical home value

O'Fallon$380K
Missouri$268K
Market temperature
Seller’s marketA strong seller's marketBuyer’sSeller’s
8
days on market
101.3%
sale-to-list price
+1.7%
value change, 1 year
110
homes sold in May
Zillow Home Value Index · Redfin Data CenterHousing market →
Safety

Less crime per resident than 80% of U.S. towns

O'Fallon reports less crime per resident than 80% of the U.S. towns and cities we grade.

A−Safety Grade

Violent crime per 1,000 residents

O'Fallon1
Missouri4.3
U.S.3.3

Property crime per 1,000 residents

O'Fallon5.2
Missouri16.9
U.S.15.5
80th
percentile among U.S. towns we grade
93rd
percentile among MO towns
92
violent crimes reported in 2025
504
property crimes reported in 2025
FBI crime data, 2025 · crimes reported to policeFull safety report →
Natural hazards

High risk, with inland flooding at the top

Expected storm and flood damage is higher than in 70% of U.S. communities.

70risk score of 100
FEMA risk score
70High riskLowerHigher
Inland floodingTornadoesEarthquakes
45
paid flood claims since 1978
5
federal disasters paid out here
FEMA National Risk Index · OpenFEMANatural hazards →
Climate

Four seasons, hot summers

O'Fallon has chilly winters and warm summers. A typical July afternoon reaches 88°, a January night drops to 22°, and about 14 inches of snow falls in a normal winter.

14″snow a winter

Typical low → high °F

Winter25–43°
Spring44–66°
Summer66–87°
Fall46–68°
Oct 26
typical first frost
Apr 10
typical last frost
+1.0°
vs. the 20th-century average
NOAA U.S. Climate Normals, 1991–2020Full climate →
Palin speaking missouri
2008 · Palin speaking missouri · Wikimedia Commons
O'Fallon’s story

170 years in pictures

11 postcards, papers and photographs from public archives, and 3 places on the National Register.

Sarah Palin Signing AutographT.R. Hughes BallparkFort Zumwalt North High School
Explore the history →

About O'Fallon

City in Missouri, United States

Official town website ↗

O'Fallon ( oh-FAL-ən) is a city in St. Charles County, Missouri, United States. It is part of the St. Louis metropolitan statistical area, along Interstates 64 and 70 between Lake St. Louis and St. Peters. As of the 2020 census, O'Fallon had a population of 91,316, making it St. Louis's most populous suburb as well as the most populous municipality in St. Charles County and the 7th-most populous in Missouri. O'Fallon's namesake in St. Clair County, Illinois, is also part of the St. Louis region. The two cities are one of the few pairs of same-named municipalities to be part of the same metro area.

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

Established
1856
Population
91,316
Area
30 sq mi
Elevation
541 ft
ZIP code
63366, 63368
Area code
636

O'Fallon’s neighbors

8 towns share a border with O'Fallon.

Explore the map →

More about O'Fallon

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Photo of O'Fallon

O'Fallon, MO · Photo: Classiv · CC BY-SA 4.0 · Source ↗