O'Fallon, IL has a B safety grade (72/100) with a violent crime rate of 195 per 100,000, 45% below the national average.
O'Fallon (31,856 people) sits in the mid-size municipal band. This page opens with per-100,000 FBI UCR rates, then IL and national benchmarks.
O'Fallon, IL carries a PlainCrime B safety grade with violent crime 45% below the U.S. average
According to the FBI Uniform Crime Reporting (UCR) Program for 2024, O'Fallon, IL shows violent crime at 194.6 per 100,000 residents and property crime at 1,020.2 per 100,000. Violent crime runs 45% below the U.S. average. PlainCrime assigns grade B from those rates. Figures are voluntary agency submissions joined to population denominators; incomplete coverage can move the number.
The verdict
O'Fallon earns a B safety grade: violent crime runs 45% below the U.S. average, placing it close to the national middle for violent crime.
Comparable rate records
The nearest comparable 2024 records to O'Fallon's 194.6 violent-crime rate per 100,000 are Collinsville (194.9), East Dundee (193.9), Dixon (192.8), Nokomis (192.7). These are same-year agency submissions that pass the same completeness screen, not a claim that the cities have identical conditions. They make the cohort position above checkable against named records instead of a generic state average.
Position in the state cohort
At 194.6 reported violent offenses per 100,000 residents in 2024, O'Fallon ranks 150 of 506 — above 356 of the 505 other Illinois cities whose 2024 submission passes this site’s completeness test. That is +95.3% against the cohort median of 99.7. Cities that did not report, or that reported implausibly low totals, are excluded from this cohort rather than counted as low-crime.
2020–2024 direction
Across 5 comparable reporting years, the rate moved from 242.7 per 100,000 in 2020 to 194.6 in 2024 (-19.8%). The highest observed value was 242.7 in 2020 and the lowest 148.2 in 2021. Years whose submission failed the completeness test are left out of this comparison rather than plotted as change.
Offense mix
Violent offenses are 16.0% of the 387 Part I offenses reported in O'Fallon for 2024, against a median of 11.2% across comparable Illinois cities — a gap of 4.8 points. Offense mix is shaped by which agencies report and how incidents are classified as well as by the underlying offenses, so it describes the reported record rather than a settled difference in conditions.
Property counts dominate O'Fallon's FBI UCR Table 8 municipal row. Per-100,000 rates use the reporting-year population on that row; cities that fail the completeness test stay out of rate rankings. A citywide figure rarely describes any single neighbourhood inside the municipal boundary.
Mid-size municipal totals above are reported offenses, not safety advice for any single block. Reporting completeness still varies by year and agency.
| Offense | Count | Rate /100K |
|---|---|---|
| Property Crime | 325 | 1020.2 |
| Larceny-Theft | 216 | 678.1 |
| Burglary | 58 | 182.1 |
| Motor Vehicle Theft | 51 | 160.1 |
| Arson | 3 | 9.4 |
| Violent Crime | 62 | 194.6 |
| Aggravated Assault | 47 | 147.5 |
| Rape | 10 | 31.4 |
| Robbery | 4 | 12.6 |
| Murder | 1 | 3.1 |
Lead series · fell across 5 comparable years · FBI UCR
Secondary series · fell · 2020-2024 · FBI UCR
| Year | Coverage | Population | Violent Rate | Property Rate |
|---|---|---|---|---|
| 2020 | Comparable | 29,672 | 242.7 | 1277.3 |
| 2021 | Comparable | 29,688 | 148.2 | 1081.2 |
| 2022 | Comparable | 32,250 | 155 | 1122.5 |
| 2023 | Comparable | 32,059 | 149.7 | 1294.5 |
| 2024 | Comparable | 31,856 | 194.6 | 1020.2 |
O'Fallon's crime figures on this page originate from O'Fallon Police Department's submission to the FBI's Uniform Crime Reporting Program.
This agency reports via NIBRS, the incident-based system that captures more detail per offense (multiple crimes per incident, victim/offender data) than the older summary counts.
Crime rates read differently at different scales, so these are the Illinois cities closest to O'Fallon in population. Their populations run from 30,289 to 33,387, against 31,856 here. Or use our side-by-side compare tool to benchmark two cities directly.
These Illinois cities report the closest violent-crime rates to O'Fallon's 194.6/100K (same FBI UCR vintage rules; size peers above are excluded so the two lists stay distinct).
Mid-size read: O'Fallon figures are FBI UCR CIUS Table 8 (vintage 2024), population-adjusted per 100,000.
Denominators are the reporting-year population on the municipal row. Incomplete years are dropped from rankings. Confirm at FBI Crime Data Explorer and Census.gov QuickFacts.
Disclaimer (mid-size municipal): figures are informational, not advice. FBI Uniform Crime Reporting (UCR) Program is the source. Consult a professional before decisions.
Mid-size rate methodology for how O'Fallon's mid-size city row is sourced and ranked.
Source: FBI Uniform Crime Reporting (UCR) Program CIUS Table 8 municipal crime rates · 2024 O'Fallon, IL rates use the reporting-year population on the municipal row.
Bulk download: city crime dataset (CSV/JSON)
Every figure on PlainCrime is rendered directly from FBI Uniform Crime Reporting (UCR) source data, no number is typed in by an editor. O'Fallon is scored in the mid-size municipal band (31,856 on the row). See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.