Crime Grade · FBI UCR Data · 2025
O'Fallon, IL Crime Grade
How O'Fallon grades for violent crime against every other reporting U.S. city — and against the rest of Illinois — based on the FBI's Uniform Crime Reporting data.
National
5/10
vs. all U.S. cities ≥ 25,000 population
Illinois
6/10
vs. Illinois cities ≥ 10,000 population
In 2025, the violent crime rate in O'Fallon, IL was 140.2 per 100,000 residents (45 incidents over a population of 32,108). That puts O'Fallon Infinity% above the U.S. rate of 0.0 and 43% below the Illinois statewide rate of 245.7.
That ranks O'Fallon #1,535 of 3,771 ranked U.S. cities, safer than 59% of them, and #123 of 214 in Illinois. Violent crime is down 28% year over year and down 5% over the last five years.
O'Fallon, IL crime — key facts
- National Crime Grade
- B (5/10)
- Illinois Grade
- C (6/10)
- Violent crime rate
- 140.2 / 100k
- National rank
- #1,535 of 3,771
- IL rank
- #123 of 214
- Safer than
- 59% of U.S. cities
- Year over year
- down 28%
- 5-year change
- down 5%
- Population
- 32,108
- Reporting agency
- O'Fallon Police Department
- Data year
- 2025 · FBI UCR
Reported by O'Fallon Police Department (FBI ORI IL0821600) to the FBI Uniform Crime Reporting Program. Download the full dataset (CSV) · methodology.
Violent crime rate, 5-year trend
Per 100,000 residents. O'Fallon (red), Illinois (blue), U.S. average (gray dashed).
O'Fallon vs. U.S., 2025 — by offense
Rates per 100,000 residents for each offense category.
Full data, last 5 years
Rates per 100,000 residents. Raw counts in parentheses.
| Offense | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Violent crime | 148.2(44) | 155.0(50) | 149.7(48) | 194.6(62) | 140.2(45) |
| Murder | 3.4(1) | 3.1(1) | 3.1(1) | 3.1(1) | 6.2(2) |
| Rape | 37.1(11) | 52.7(17) | 40.6(13) | 31.4(10) | 37.4(12) |
| Robbery | 6.7(2) | 9.3(3) | 6.2(2) | 12.6(4) | 9.3(3) |
| Aggravated assault | 101.1(30) | 89.9(29) | 99.8(32) | 147.5(47) | 87.2(28) |
| Property crime | 1081.2(321) | 1122.5(362) | 1294.5(415) | 1032.8(329) | 918.8(295) |
| Burglary | 60.6(18) | 102.3(33) | 131.0(42) | 185.2(59) | 87.2(28) |
| Larceny | 889.2(264) | 911.6(294) | 1032.5(331) | 678.1(216) | 722.6(232) |
| Motor vehicle theft | 128.0(38) | 108.5(35) | 118.5(38) | 160.1(51) | 102.8(33) |
How the Crime Grade is calculated
- What is the source of the O'Fallon, IL Crime Grade?
- FBI Uniform Crime Reporting via the Crime Data Explorer. Agency-level data, pulled directly. No third-party aggregators, no proprietary score.
- What metric does the O'Fallon Crime Grade use?
- Violent crime rate per 100,000 residents (murder + rape + robbery + aggravated assault), most recent fully-reported year.
- How is the national decile for O'Fallon calculated?
- O'Fallon's rate placed against all FBI-reporting U.S. cities with population ≥ 25,000. 1 = safest.
- How is the Illinois state decile calculated?
- Same calculation restricted to Illinois cities with population ≥ 10,000.
- How do decile scores convert to a letter grade?
- 1–3 = A · 4–5 = B · 6–7 = C · 8 = D · 9–10 = F.
- How often is the O'Fallon Crime Grade refreshed?
- Twice a year. The FBI typically releases the prior year's full data each September.
- What are the limits of this Crime Grade?
- The FBI relies on local agency reporting. Rates reflect what was reported, not what occurred.
Nearby cities in Illinois
Comparable Illinois cities by population.
Compare O'Fallon to other places
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