Crime in Ontario, California
Major crime in Ontario is about the U.S. rate per resident: 25% lower for persons crimes and about the same for property crimes. Expected major crimes are down 9.7% 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.
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Motor vehicle theft stands out most, at 1.8 times the U.S. rate
Expected crimes per year in Ontario 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 Ontario
The middle half of Ontario residents live in neighborhoods with a major-crime index between 34 and 85; the typical (median) resident's is 56. The citywide figure (97) is higher than that because crime concentrates in a smaller set of areas.
- 0–5043.7%
- 50–10037.2%
- 100–20014.1%
- 200–4001.7%
- 400+3.3%
Share of residents by the index of their census block group, a neighborhood of roughly 600 to 3,000 people.
Highest on weeknights
Major-crime index by time of week, against the U.S. rate for the same hours.
Major crime fell 9.7% in a year; across California it fell 7.4%
Change in expected crimes, with California as a whole in gray. The past year uses the reporting agencies' year-to-date FBI data; 2031 is the model's projection.
Ontario against U.S. places with 100,000 to 250,000 residents
161 of the 268 other places of this size have a higher major-crime index than Ontario; the middle of the group is 109. The 9 nearest in population:
Major-crime index per resident, U.S. = 100; residents in gray.
Ontario 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, Chino (4 mi), is 37% above Ontario's rate.
Major-crime index per resident, U.S. = 100; distances between where residents live, in miles.
Questions about crime in Ontario
What are the most common crimes in Ontario?
By expected count, the most common persons and property crimes are theft from vehicle (about 740 a year), other larceny (about 656 a year) and motor vehicle theft (about 527 a year). Compared with the U.S., motor vehicle theft stands out most: 1.8 times 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. Ontario's figures add up its 101 block groups. The index compares crimes per resident with the U.S. rate.
- Ontario's published incident records inform the estimate for every neighborhood.
- 28.2% 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: 188,544. Model updated Oct 20, 2026. Release 2026-2026-10-20-2
Full method and validation·Data sources
CrimeMetric. "Crime in Ontario, California." Vorp Labs, model updated Oct 20, 2026. https://crimemetric.com/ca/ontario
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Major-crime index, U.S. = 100
- Chino4 mi133
- Montclair4 mi223
- Upland5 mi86
- Rancho Cucamonga6 mi92
- Claremont7 mi96
- Eastvale7 mi57
- Pomona7 mi183
- Chino Hills8 mi47