Mason City, IL has a A+ safety grade (90/100) with a violent crime rate of 51 per 100,000, 85% below the national average.
Mason City's UCR row covers a small municipal population (1,953). Rates below are per 100,000 and sit next to IL and U.S. averages.
Mason City, IL carries a PlainCrime A+ safety grade with violent crime 85% below the U.S. average
According to the FBI Uniform Crime Reporting (UCR) Program for 2024, Mason City, IL shows violent crime at 51.2 per 100,000 residents and property crime at 563.2 per 100,000. Violent crime runs 85% below the U.S. average. PlainCrime assigns grade A+ from those rates. Figures are voluntary agency submissions joined to population denominators; incomplete coverage can move the number.
The verdict
Mason City earns an A+ safety grade: violent crime runs 85% below the U.S. average, placing it safer than most U.S. cities.
Based on 1 reported violent incidents in a population of 1,953. At this volume, one additional or one fewer report can shift the rate and letter grade noticeably; small-city crime counts are inherently more volatile year to year than large-city counts, so treat this grade as a data point, not a precise ranking.
Small-count caution
Mason City reported 1 violent offences in 2024 against a population of 1,953. At this volume one additional or one fewer report moves the per-100,000 rate noticeably, so the figure is better read as a data point than as a precise measurement, and year-to-year swings here are expected.
2020–2024 direction
Across 5 comparable reporting years, the rate moved from 477.1 per 100,000 in 2020 to 51.2 in 2024 (-89.3%). The highest observed value was 477.1 in 2020 and the lowest 49.7 in 2022. Years whose submission failed the completeness test are left out of this comparison rather than plotted as change.
Comparable rate records
The nearest comparable 2024 records to Mason City's 51.2 violent-crime rate per 100,000 are Mount Zion (51.4), Arlington Heights (50.3), Barrington Hills (50.1), Catlin (52.5). These are same-year agency submissions that pass the same completeness screen, not a claim that the cities have identical conditions. They make the cohort position above checkable against named records instead of a generic state average.
Property-offense composition
Larceny-theft is 45.5% of reported property offenses in Mason City, against a cohort median of 70.3%. The remainder is burglary (4) and motor vehicle theft (2). Composition differences of this size usually track what kinds of places and property are present in a jurisdiction.
Position in the state cohort
At 51.2 reported violent offenses per 100,000 residents in 2024, Mason City ranks 349 of 506 — above 157 of the 505 other Illinois cities whose 2024 submission passes this site’s completeness test. That is -49.2% against the cohort median of 100.7. Cities that did not report, or that reported implausibly low totals, are excluded from this cohort rather than counted as low-crime.
Property counts dominate Mason City's FBI UCR Table 8 municipal row. Per-100,000 rates use the reporting-year population on that row; cities that fail the completeness test stay out of rate rankings. A citywide figure rarely describes any single neighbourhood inside the municipal boundary.
Based on 1 reported violent incidents in a population of 1,953. At this volume, one additional or one fewer report can shift the rate and letter grade noticeably; small-city crime counts are inherently more volatile year to year than large-city counts, so treat this grade as a data point, not a precise ranking.
On a small municipal row, small denominators make rates sensitive to a handful of incidents. Figures are reported totals, not neighbourhood advice.
| Offense | Count | Rate /100K |
|---|---|---|
| Property Crime | 11 | 563.2 |
| Larceny-Theft | 5 | 256 |
| Burglary | 4 | 204.8 |
| Motor Vehicle Theft | 2 | 102.4 |
| Arson | 0 | 0 |
| Violent Crime | 1 | 51.2 |
| Rape | 1 | 51.2 |
| Murder | 0 | 0 |
| Robbery | 0 | 0 |
| Aggravated Assault | 0 | 0 |
Lead series · fell across 5 comparable years · FBI UCR
Secondary series · fell · 2020-2024 · FBI UCR
| Year | Coverage | Population | Violent Rate | Property Rate |
|---|---|---|---|---|
| 2020 | Comparable | 2,096 | 477.1 | 954.2 |
| 2021 | Comparable | 2,064 | 387.6 | 436 |
| 2022 | Comparable | 2,011 | 49.7 | 348.1 |
| 2023 | Comparable | 1,994 | 250.8 | 902.7 |
| 2024 | Comparable | 1,953 | 51.2 | 563.2 |
Mason City's crime figures on this page originate from Mason City Police Department's submission to the FBI's Uniform Crime Reporting Program.
This agency reports via NIBRS, the incident-based system that captures more detail per offense (multiple crimes per incident, victim/offender data) than the older summary counts.
Crime rates read differently at different scales, so these are the Illinois cities closest to Mason City in population. Their populations run from 1,849 to 2,034, against 1,953 here. Or use our side-by-side compare tool to benchmark two cities directly.
These Illinois cities report the closest violent-crime rates to Mason City's 51.2/100K (same FBI UCR vintage rules; size peers above are excluded so the two lists stay distinct).
Micro-municipal read: Mason City's FBI UCR Table 8 row (2024) is the only source for the rates above.
With a small population base, per-100,000 rates amplify sparse counts. Incomplete submissions are excluded from rankings. See FBI.gov UCR for the raw Table 8 file.
Disclaimer (small municipal): small-base rates are especially easy to misread. Informational only - not advice. Source: FBI UCR Program.
Micro-municipal rate methodology for how Mason City's small municipal row is sourced and ranked.
Source: FBI Uniform Crime Reporting (UCR) Program CIUS Table 8 municipal crime rates · 2024 Mason City, IL rates use the reporting-year population on the municipal row.
Bulk download: city crime dataset (CSV/JSON)
Every figure on PlainCrime is rendered directly from FBI Uniform Crime Reporting (UCR) source data, no number is typed in by an editor. Mason City is scored as a small municipal UCR reporter (1,953 on the row). See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.