Crime in Mason City, Illinois
Major crime in Mason City is 58% below the U.S. rate per resident: 56% lower for persons crimes and 58% lower for property crimes. Expected major crimes are down 8.9% 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 Mason City
Every crime type in Mason City is near or below the U.S. rate
Expected crimes per year in Mason City for each type, and the index against the U.S. rate per resident.
Citywide indexWhere the middle half of residents live
Social disorder
Neighborhoods in Mason City
Mason City is made up of 3 census block groups. The typical resident lives where the major-crime index is 43; the middle half of residents live where it is between 43 and 48.
- 0–50100.0%
- 50–1000.0%
- 100–2000.0%
- 200–4000.0%
- 400+0.0%
Share of residents by the index of their census block group, a neighborhood of roughly 600 to 3,000 people.
Lowest on weekend daytimes
Major-crime index by time of week, against the U.S. rate for the same hours.
Major crime fell 8.9% 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.
Mason City against U.S. places with 2,000 to 5,000 residents
1,198 of the 1,761 other places of this size have a higher major-crime index than Mason City; the middle of the group is 58. The 9 nearest in population:
Major-crime index per resident, U.S. = 100; residents in gray.
Mason City has a higher major-crime index than 1 of its 8 nearest neighbors
The 8 nearest cities and towns we cover, by major-crime index. The closest, Lincoln (18 mi), is 3.1 times Mason City's rate.
Major-crime index per resident, U.S. = 100; distances between where residents live, in miles.
Questions about crime in Mason City
What are the most common crimes in Mason City?
By expected count, the most common persons and property crimes are other larceny (about 6 a year), burglary (about 3 a year) and aggravated assault (about 2 a year). Compared with the U.S., rape / sexual assault stands out most: about 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. Mason City's figures add up its 3 block groups. The index compares crimes per resident with the U.S. rate.
- Mason City has no published incident records in our data, so its estimate relies on agency totals and neighborhood characteristics.
- 0.0% 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: 2,124. Model updated Oct 20, 2026. Release 2026-2026-10-20-2
Full method and validation·Data sources
CrimeMetric. "Crime in Mason City, Illinois." Vorp Labs, model updated Oct 20, 2026. https://crimemetric.com/il/mason-city
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Major-crime index, U.S. = 100
- Lincoln18 mi129
- Havana20 mi111
- Sherman22 mi31
- Pekin25 mi118
- Lewistown28 mi44
- Springfield29 mi255
- Bartonville30 mi113
- Canton31 mi95