Crime in O'Fallon, Illinois
Major crime in O'Fallon is 41% below the U.S. rate per resident: 60% lower for persons crimes and 37% lower for property crimes. Expected major crimes are down 7.6% from a year earlier.
Modeled estimates per resident, not counts of incidents. How we calculated this
Index: crimes per resident compared with the U.S., where 100 is the U.S. rate and 200 is twice it.
Check an address in O'Fallon
Shoplifting stands out most, at 18% above the U.S. rate
Expected crimes per year in O'Fallon for each type, and the index against the U.S. rate per resident.
Citywide indexWhere the middle half of residents live
Property crimes
Social disorder
How crime varies across O'Fallon
The middle half of O'Fallon residents live in neighborhoods with a major-crime index between 13 and 48; the typical (median) resident's is 21. The citywide figure (59) is higher than that because crime concentrates in a smaller set of areas.
- 0–5075.1%
- 50–10011.5%
- 100–2004.7%
- 200–4005.8%
- 400+2.9%
Share of residents by the index of their census block group, a neighborhood of roughly 600 to 3,000 people.
Highest on weekend daytimes
Major-crime index by time of week, against the U.S. rate for the same hours.
Major crime fell 7.6% in a year; across Illinois it fell 9.6%
Change in expected crimes, with Illinois as a whole in gray. The past year uses the reporting agencies' year-to-date FBI data; 2031 is the model's projection.
O'Fallon against U.S. places with 25,000 to 50,000 residents
635 of the 960 other places of this size have a higher major-crime index than O'Fallon; the middle of the group is 77. The 9 nearest in population:
Major-crime index per resident, U.S. = 100; residents in gray.
O'Fallon has a higher major-crime index than 5 of its 8 nearest neighbors
The 8 nearest cities and towns we cover, by major-crime index. The closest, Shiloh (4 mi), is 62% below O'Fallon's rate.
Major-crime index per resident, U.S. = 100; distances between where residents live, in miles.
Questions about crime in O'Fallon
What are the most common crimes in O'Fallon?
By expected count, the most common persons and property crimes are shoplifting (about 131 a year), other larceny (about 82 a year) and theft from vehicle (about 36 a year). Compared with the U.S., shoplifting stands out most: 18% above the U.S. rate per resident.
How we calculated this
Each police agency's crimes, as reported to the FBI, are spread across the census block groups it serves using population, jobs, points of interest and, where available, local incident records. O'Fallon's figures add up its 17 block groups. The index compares crimes per resident with the U.S. rate.
- O'Fallon has no published incident records in our data, so its estimate relies on agency totals and neighborhood characteristics.
- 40.0% of residents live in block groups whose estimate has high confidence (80% interval within about 5x).
- Rates are per resident, so places where many people work or visit but few live, such as downtowns, airports and stadiums, can read high.
- Disorderly conduct and trespassing are modeled, because the FBI records them only through arrests.
- Residents: 34,862. Model updated Oct 20, 2026. Release 2026-2026-10-20-2
Full method and validation·Data sources
CrimeMetric. "Crime in O'Fallon, Illinois." Vorp Labs, model updated Oct 20, 2026. https://crimemetric.com/il/o-fallon
Use these numbers in your product
Any U.S. address by API or MCP, free for 10,000 lookups a month.
Get a free API keyNearest cities we publish
Major-crime index, U.S. = 100
- Shiloh4 mi22
- Fairview Heights4 mi193
- Swansea5 mi40
- Lebanon5 mi25
- Collinsville6 mi66
- Belleville7 mi92
- Troy8 mi30
- Maryville9 mi24