Marengo, IL has a A safety grade (82/100) with a violent crime rate of 131 per 100,000, 63% below the national average.
FBI UCR 2024 · per-capita rates · small city
Marengo is a small municipal reporter (7,626 on the UCR row). Per-100,000 violent and property rates are shown with IL and U.S. context.
Data updated 2026-08-24
Marengo, IL carries a PlainCrime A safety grade with violent crime 63% below the U.S. average
According to the FBI Uniform Crime Reporting (UCR) Program for 2024, Marengo, IL shows violent crime at 131.1 per 100,000 residents and property crime at 577 per 100,000. Violent crime runs 63% 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.
Small-count caution
Marengo reported 10 violent offences in 2024 against a population of 7,626. 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.
Comparable rate records
The nearest comparable 2024 records to Marengo's 131.1 violent-crime rate per 100,000 are Highland (130.9), Mendota (130.6), Streamwood (128.9), Forest View (134.2). 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.
2022–2024 direction
Across 3 comparable reporting years, the rate moved from 105.4 per 100,000 in 2022 to 131.1 in 2024 (+24.4%). The highest observed value was 224.5 in 2023 and the lowest 105.4 in 2022. Years whose submission failed the completeness test are left out of this comparison rather than plotted as change.
Offense mix
Violent offenses are 18.5% of the 54 Part I offenses reported in Marengo for 2024, against a median of 11.2% across comparable Illinois cities — a gap of 7.3 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.
Property-offense composition
Larceny-theft is 79.5% of reported property offenses in Marengo, against a cohort median of 70.2%. The remainder is burglary (8) and motor vehicle theft (1). Composition differences of this size usually track what kinds of places and property are present in a jurisdiction.
Position in the state cohort
At 131.1 reported violent offenses per 100,000 residents in 2024, Marengo ranks 216 of 506 — above 290 of the 505 other Illinois cities whose 2024 submission passes this site’s completeness test. That is +31.6% against the cohort median of 99.7. 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 Marengo'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 10 reported violent incidents in a population of 7,626. 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-city offense counts above are voluntary UCR submissions, not neighbourhood advice. Year-to-year swings can look large when the population base is modest.
Across 8.9 Census sq mi, Marengo logged 4.9 property and 1.1 violent offenses per square mile in 2024.
Marengo's 2024 book concentrates in larceny-theft (65% of 54 offenses; mix index 4,791).
Violent offenses are 19% of the municipal total; property offenses still dominate the count.
Marengo offense mix (2024)
Density uses Census Gazetteer land area (8.9 sq mi); mix index is HHI x 10,000 on the offense-type shares above. Distinct from the per-100K rates in the hero.
| Offense | Count | Rate /100K |
|---|---|---|
| Property Crime | 44 | 577 |
| Larceny-Theft | 35 | 459 |
| Burglary | 8 | 104.9 |
| Arson | 5 | 65.6 |
| Motor Vehicle Theft | 1 | 13.1 |
| Violent Crime | 10 | 131.1 |
| Aggravated Assault | 9 | 118 |
| Rape | 1 | 13.1 |
| Murder | 0 | 0 |
| Robbery | 0 | 0 |
The chart omits 2020, 2021 rather than drawing an unsupported zero or partial-coverage dip. The table preserves the year and marks the gap.
Lead series · rose across 3 comparable years · FBI UCR
Secondary series · rose · 2022-2024 · FBI UCR
| Year | Coverage | Population | Violent Rate | Property Rate |
|---|---|---|---|---|
| 2020 | Insufficient reporting | 7,411 | - | - |
| 2021 | Insufficient reporting | 7,348 | - | - |
| 2022 | Comparable | 7,590 | 105.4 | 395.3 |
| 2023 | Comparable | 7,571 | 224.5 | 713.2 |
| 2024 | Comparable | 7,626 | 131.1 | 577 |
Marengo Police Department filed the 2024 UCR row behind Marengo's 54 reported offenses (3-year span 2022-2024).
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 Marengo in population. Their populations run from 7,661 to 7,882, against 7,626 here. Or use our side-by-side compare tool to benchmark two cities directly.
Marengo sits at 131.1/100K violent (grade A); the Illinois cities below are the nearest matches after size peers are removed.
In 2024, Marengo reported 10 violent crimes and 44 property crimes, for a total of 54 reported offenses.
From 2023 to 2024, Marengo's violent crime rate decreased by 41.6%, and the property crime rate decreased by 19.1%.
The most common crime type in Marengo is larceny-theft, accounting for 64.8% of all reported crimes (35 incidents in 2024).
Small-city read: Marengo is sourced from FBI UCR Table 8 for 2024; rates use that row's population.
Small-city rows use the same per-100,000 formula; a few unreported years can leave gaps in the trend table. Verify the agency's submission on FBI.gov UCR.
Disclaimer (small city): UCR counts here are informational only. They are not a victimization probability. Source: FBI UCR Program.
Small-city rate methodology for how Marengo's small city row is sourced and ranked.
Source: FBI Uniform Crime Reporting (UCR) Program CIUS Table 8 municipal crime rates · 2024 Marengo, 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. Marengo is scored as a small-city UCR reporter (7,626 on the row). See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.