County crime profile · 2024 · mid-size county · violent-led
Mason County (13,086 people) sits in the mid-size county band in Illinois. This page opens with reported offense counts, then rates where a Census join exists.
Data updated 2026-08-24
Mason County, IL reported 31 violent crimes per 100,000 in FBI UCR 2024
According to the FBI Uniform Crime Reporting (UCR) Program for 2024, Mason County, IL agencies reported 4 violent and 2 property offenses. That equals about 31 violent and 15 property crimes per 100,000 using a verified Census population join. Table 10 coverage is a voluntary subset of U.S. counties.
Offense mix
Violent offenses are 66.7% of the 6 Part I offenses reported in Mason County for 2024, against a median of 20.1% across comparable Illinois counties — a gap of 46.6 points. Offense mix is shaped by which agencies report and how incidents are classified as well as by the underlying offenses, so it describes the reported record rather than a settled difference in conditions.
Small-count caution
Mason County reported 4 violent offences in 2024 against a population of 13,086. 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.
Property-offense composition
Larceny-theft is 0.0% of reported property offenses in Mason County, against a cohort median of 53.3%. The remainder is burglary (2) and motor vehicle theft (0). Composition differences of this size usually track what kinds of places and property are present in a jurisdiction.
Position in the state cohort
At 30.6 reported violent offenses per 100,000 residents in 2024, Mason County ranks 48 of 77 — above 29 of the 76 other Illinois counties whose 2024 submission passes this site’s completeness test and carries a matched Census denominator. That is -18.8% against the cohort median of 37.6. Counties that did not report, or that reported implausibly low totals, are excluded from this cohort rather than counted as low-crime.
Mid-size county rows still aggregate voluntary UCR submissions. Per-100,000 rates need a matched 2020 Census population; unmatched stay count-only. County-wide totals rarely describe any single town inside the line.
| Category | Count |
|---|---|
| Violent Crime | 4 |
| Murder | 0 |
| Rape | 0 |
| Robbery | 0 |
| Aggravated Assault | 4 |
| Property Crime | 2 |
| Burglary | 2 |
| Larceny-Theft | 0 |
| Motor Vehicle Theft | 0 |
| Arson | 0 |
Mason County's crime figures on this page originate from Mason County Sheriff's Office'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.
A per-capita rate is easiest to read against places of similar scale, so these are the Illinois counties closest to Mason County in population. Their populations run from 11,985 to 13,877, against 13,086 here. Or launch the side-by-side compare tool to benchmark two jurisdictions directly.
State atlas: Illinois · Compare · Rankings
Source: FBI Uniform Crime Reporting (UCR) Program, Crime in the United States (CIUS) Table 10.
FBI Table 10 supplies county offense counts but no resident population. Where this page shows a per-100,000 rate, the denominator is a separately matched 2020 U.S. Census Bureau county population; unmatched county rows remain count-only. Statewide comparisons draw on the state UCR program. Verify with FBI.gov UCR and Census.gov QuickFacts.
Read our methodology , how this data is sourced, computed, and verified.
Every figure on PlainCrime is rendered directly from FBI Uniform Crime Reporting (UCR) source data, no number is typed in by an editor. This page draws directly on FBI Uniform Crime Reporting source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.