Crime in Mason City, Iowa
Major crime in Mason City is 34% above the U.S. rate per resident: about the same for persons crimes and 43% higher for property crimes. Expected major crimes are down 16.8% 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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Rape / sexual assault stands out most, at 2.8 times 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
Property crimes
Social disorder
How crime varies across Mason City
The middle half of Mason City residents live in neighborhoods with a major-crime index between 52 and 171; the typical (median) resident's is 95. The citywide figure (134) is higher than that because crime concentrates in a smaller set of areas.
- 0–5014.2%
- 50–10043.2%
- 100–20018.0%
- 200–40020.2%
- 400+4.5%
Share of residents by the index of their census block group, a neighborhood of roughly 600 to 3,000 people.
Highest on weekday daytimes
Major-crime index by time of week, against the U.S. rate for the same hours.
Major crime fell 16.8% in a year; across Iowa it fell 10.5%
Change in expected crimes, with Iowa 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 25,000 to 50,000 residents
171 of the 960 other places of this size have a higher major-crime index than Mason City; the middle of the group is 77. 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 all of its 8 nearest neighbors
The 8 nearest cities and towns we cover, by major-crime index. The closest, Clear Lake (8 mi), is 34% below 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 shoplifting (about 194 a year), other larceny (about 157 a year) and burglary (about 104 a year). Compared with the U.S., rape / sexual assault stands out most: 2.8 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. Mason City's figures add up its 26 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.
- 67.1% 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: 27,247. Model updated Oct 20, 2026. Release 2026-2026-10-20-2
Full method and validation·Data sources
CrimeMetric. "Crime in Mason City, Iowa." Vorp Labs, model updated Oct 20, 2026. https://crimemetric.com/ia/mason-city
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Major-crime index, U.S. = 100
- Clear Lake8 mi89
- Osage21 mi30
- Lake Mills25 mi28
- Charles City27 mi52
- Hampton28 mi25
- Albert Lea, MN36 mi104
- Austin, MN37 mi104
- Clarion40 mi28