Each edition grades its towns against each other only.
For most people who can afford it, yes. O'Fallon grades A− overall, 252nd of 767 graded towns in Illinois. Residents are healthier than 88% of U.S. towns on CDC estimates. The median household earns $106K and its public schools beat 78% of Illinois towns on state tests and graduation. What holds it back is price: homes are expensive, about $315K for a typical one and 3.9 times the St. Louis metro’s $80K median household income. 52% of adults 25 and older hold a bachelor’s degree or more in O'Fallon, above both the Illinois town median (29%) and the median of U.S. towns (29%). O'Fallon is easier to get around on foot or by transit than 81% of U.S. towns. Tiedemann House is on the National Register of Historic Places.
Where O'Fallon beats most towns.
| Widest gap | O'Fallon | IL |
|---|---|---|
| Fewer uninsured adults | 5.4% | 9.9% |
Tiedemann House28,281 counted in 2010 and 32,289 in 2020; an estimated 32,656 in 2025.
Growth has leveled off: within 1% of 2020, after 14.2% in the decade before.
U.S. Census 2010 & 2020 counts · Census Bureau estimate, July 1, 2025
Each subject compared with towns across the country (schools within Illinois), ordered by how far O'Fallon is from typical.
How TownRatings grades towns →
Census counts: 1,117 in 1870, 32,289 in 2020. The archive holds 12 old photos and papers going back to 1917 and 7 maps from 1907 on.
1 place on the National Register of Historic Places.
Museums, parks, gardens and other places to visit around O'Fallon. Close and well known come first.
Big draw9 mi State parkCahokia
Big draw15 mi Stadium & arenaThe Dome at America's Center
15 mi Stadium & arenaBusch Stadium
9 mi LandmarkMonks Mound
14 mi National ParkGateway Arch National Park2.2M visitors a year
16 mi Stadium & arenaEnterprise CenterCahokia: Thank You (24 Millions ) views, 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 · Monks Mound: Skubasteve834, CC BY-SA 3.0 · Gateway Arch National Park: Daniel Schwen, CC BY-SA 4.0 · Enterprise Center: Haaron755, CC BY-SA 3.0
Who provides power, water and the rest in O'Fallon, and how to reach them.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Sep 12, 2025.
Ordered by what stands out in O'Fallon.
O'Fallon has less no health insurance than most of Illinois and has seen reported crime fall by a fifth or more.
Its widest gap with Illinois is no health insurance: 5.4% of those 18–64 have no health insurance, against 9.9% statewide.
O'Fallon: one in ten adults worry about having enough food. Two figures for adults in the town: 20% binge drink, 18% get no exercise outside work.
| O'Fallon | Illinois towns | U.S. towns | |
|---|---|---|---|
| Frequent physical distress (CDC PLACES) | 11% | 13% | 14% |
| Binge drink (CDC PLACES) | 20% | 18% | 16% |
| Get no exercise (CDC PLACES) | 18% | 23% | 25% |
| Fair or poor health (CDC PLACES) | 14% | 18% | 19% |
| What stands out | O'Fallon | IL |
|---|---|---|
| Fewer uninsured adults | 5.4% | 9.9% |
| Fewer adults facing food insecurity | 10.1% | 15.9% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
3.6 miles of trail wind through 9 parks and preserves. O'Fallon Family Sports Park, at 200 acres with 2.2 miles of trail, is the biggest park or preserve. The trail network density for O'Fallon comes to 0.2 miles per square mile.
| O'Fallon | Illinois towns | U.S. towns | |
|---|---|---|---|
| Miles of trail per square mile | 0.2 miles per square mile | 0.3 | 0.4 |
| Conserved land | 5% | 3.6% | 4.3% |
| Biggest places to walk | Trails | Acres |
|---|---|---|
| 1. O'Fallon Family Sports Park | 2.2 mi | 200 |
| 2. St Ellen Mine Park | — | 71 |
| 3. Rock Springs Park | 0.1 mi | 43 |
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
July afternoons reach 88°, January nights drop to 23° and about 11 inches of snow falls in a winter.
NOAA U.S. Climate Normals, 1991–2020
Commuting out is the norm in O'Fallon: 13% of working residents work locally. Jobs based in O'Fallon grew to 11,482 in 2023, 2,036 more than in 2013. Among residents here, 6.2% live below the poverty line. For half of commuters, work is under 15 miles away.
| O'Fallon | Illinois towns | U.S. towns | |
|---|---|---|---|
| Work from home | 20% | 11% | 11% |
| Median household income | $106,000 | $83,000 | $80,000 |
| Working residents who work in town | 13% | 8.3% | 8% |
| Below the poverty line | 6.2% | 8.4% | 9.6% |
Census LEHD 2023 · ACS
Federal aid has come to O'Fallon households in 3 declared disasters; the latest was in 2024. Storm and flood damage is expected to run higher than in 57% of U.S. communities. The national flood insurance program has paid 12 claims here since 2000. FEMA puts 32% of the town’s expected hazard losses down to inland flooding, and 28% to earthquakes.
FEMA disaster declarations and aid · FEMA flood insurance claims · FEMA National Risk Index · OpenFEMA
A home in O'Fallon typically sold within 37 days of listing. Homes in the town are typically worth about $315,000, up 2.6% in a year, 6% above the Illinois typical home. In O'Fallon, the median rent is $1,332 a month.
| O'Fallon | Illinois towns | U.S. towns | |
|---|---|---|---|
| Median rent | $1,332 a month | $1,128 a month | $1,185 a month |
| Households that own their home | 70% | 75% | 73% |
Census ACS, 2020–24 · Zillow Home Value Index · Redfin Data Center
Reported crimes fell from 459 to 338 over the last three FBI years, a drop beyond ordinary year-to-year swings.
In O'Fallon, the rate of reported violence is 1.4 per 1,000 residents. The town’s rate of thefts and burglaries comes in at 9.1 per 1,000 residents.
| O'Fallon | Illinois towns | U.S. towns | |
|---|---|---|---|
| Violent crimes per 1,000 (2025) | 1.4 per 1,000 residents | 1 | 1.6 |
| Property crimes per 1,000 (2025) | 9.1 per 1,000 residents | 7.9 | 9.9 |
FBI crime data, 2025 · crimes reported to police
3 within 15 miles of the center of O'Fallon
About 7 of every 100 O'Fallon residents are enrolled in college, about the same as Illinois.
4 notable people were born in O'Fallon.
City in Illinois, United States
O'Fallon is a city in St. Clair County, Illinois, United States. The 2020 census listed the population at 32,289. The city is the second largest city in the Metro East region and Southern Illinois. It sits 5 miles (8.0 km) from Scott Air Force Base and 18 miles (29 km) from Downtown St. Louis. Like its namesake in St. Charles County, Missouri, O'Fallon is part of the St. Louis metro area. This makes O'Fallon (along with the two Troys in Illinois and Missouri) one of the few pairs of like-named municipalities to be part of the same metro region.
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
8 towns share a border with O'Fallon.
St. Clair Township next door grades lower for schools (C+ to O'Fallon’s A−) and higher for cost of living (B− to C−).
| Town | IL rank | Overall | Cost | Safety | Schools | Health |
|---|---|---|---|---|---|---|
| O'Fallon | #252 | A− | C− | B− | A− | A |
| Shiloh | #156 | A | C | B+ | A− | A− |
| O'Fallon Township | #159 | A | C | — | A− | A |
| Fairview Heights | #568 | C | B | D | B− | B− |
| Scott AFB | #222 | A− | D | — | A | A |
| Caseyville Township | #342 | B+ | C+ | — | B | B |
| Shiloh Valley Township | #170 | A | C− | — | A | A− |
| Swansea | #266 | A− | B− | B+ | B+ | B+ |
O'Fallon Township, Scott AFB, Caseyville Township and Shiloh Valley Township report no FBI crime data of their own. Compare O'Fallon with a neighbor →
Short answers, built from the data on this page.
For most people who can afford it, yes. O'Fallon grades A− overall, better than 78% of U.S. towns and #252 of 767 in Illinois. It grades A for health, B− for safety and A− for schools. Cost of living is its weak spot, with a C−.
Yes. Cost of living, which also weighs rents, property taxes and how many households pay 30% or more of their income for housing, grades C−.
4 notable people were born here, including William Holden and Bernie Fuchs.
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