County crime profile · 2024 · large county · property-led
At 52,533 residents, Grundy County is a large county in Illinois. FBI UCR county totals below are read before any per-100,000 rate (Census denominator when matched).
Data updated 2026-08-24
Grundy County, IL reported 42 violent crimes per 100,000 in FBI UCR 2024
According to the FBI Uniform Crime Reporting (UCR) Program for 2024, Grundy County, IL agencies reported 22 violent and 75 property offenses. That equals about 42 violent and 143 property crimes per 100,000 using a verified Census population join. Table 10 coverage is a voluntary subset of U.S. counties.
Small-count caution
Grundy County reported 22 violent offences in 2024 against a population of 52,533. 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.
2022–2024 direction
Across 3 comparable reporting years, the rate moved from 49.5 per 100,000 in 2022 to 41.9 in 2024 (-15.4%). The highest observed value was 51.4 in 2023 and the lowest 41.9 in 2024. Years whose submission failed the completeness test are left out of this comparison rather than plotted as change.
Property-offense composition
Larceny-theft is 62.7% of reported property offenses in Grundy County, against a cohort median of 51.7%. The remainder is burglary (23) and motor vehicle theft (5). Composition differences of this size usually track what kinds of places and property are present in a jurisdiction.
Position in the state cohort
At 41.9 reported violent offenses per 100,000 residents in 2024, Grundy County ranks 32 of 77 — above 45 of the 76 other Illinois counties whose 2024 submission passes this site’s completeness test and carries a matched Census denominator. That is +12.3% against the cohort median of 37.3. Counties that did not report, or that reported implausibly low totals, are excluded from this cohort rather than counted as low-crime.
On a large county row, county figures aggregate every participating agency inside the county. Participation is voluntary. Per-100,000 rates use a separately matched 2020 U.S. Census county population, never a Table 10 field; unmatched counties stay count-only. A large county line encloses very different communities.
| Category | Count |
|---|---|
| Property Crime | 75 |
| Burglary | 23 |
| Larceny-Theft | 47 |
| Motor Vehicle Theft | 5 |
| Arson | 1 |
| Violent Crime | 22 |
| Murder | 1 |
| Rape | 9 |
| Robbery | 0 |
| Aggravated Assault | 12 |
Grundy County's crime figures on this page originate from Grundy 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 Grundy County in population. Their populations run from 49,967 to 55,691, against 52,533 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.