Oak Brook, IL has a B safety grade (64/100) with a violent crime rate of 62 per 100,000, 82% below the national average.
Oak Brook is a small municipal reporter (8,015 on the UCR row). Per-100,000 violent and property rates are shown with IL and U.S. context.
Oak Brook, IL carries a PlainCrime B safety grade with violent crime 82% below the U.S. average
According to the FBI Uniform Crime Reporting (UCR) Program for 2024, Oak Brook, IL shows violent crime at 62.4 per 100,000 residents and property crime at 6,325.6 per 100,000. Violent crime runs 82% below the U.S. average. PlainCrime assigns grade B from those rates. Figures are voluntary agency submissions joined to population denominators; incomplete coverage can move the number.
The verdict
Oak Brook earns a B safety grade: violent crime runs 82% below the U.S. average, placing it safer than most U.S. cities.
Based on 5 reported violent incidents in a population of 8,015. 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
Oak Brook reported 5 violent offences in 2024 against a population of 8,015. 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 4 comparable reporting years, the rate moved from 161.9 per 100,000 in 2020 to 62.4 in 2024 (-61.5%). The highest observed value was 161.9 in 2020 and the lowest 0.0 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 Oak Brook's 62.4 violent-crime rate per 100,000 are Phoenix (62.4), Island Lake (62.7), Wheeling (61.7), Geneva (61.7). 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.
Offense mix
Violent offenses are 1.0% of the 512 Part I offenses reported in Oak Brook for 2024, against a median of 11.3% across comparable Illinois cities — a gap of 10.3 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 93.7% of reported property offenses in Oak Brook, against a cohort median of 70.2%. The remainder is burglary (25) and motor vehicle theft (7). Composition differences of this size usually track what kinds of places and property are present in a jurisdiction.
Position in the state cohort
At 62.4 reported violent offenses per 100,000 residents in 2024, Oak Brook ranks 323 of 506 — above 182 of the 505 other Illinois cities whose 2024 submission passes this site’s completeness test. That is -38.1% 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 Oak Brook'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 5 reported violent incidents in a population of 8,015. 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.
| Offense | Count | Rate /100K |
|---|---|---|
| Property Crime | 507 | 6325.6 |
| Larceny-Theft | 475 | 5926.4 |
| Burglary | 25 | 311.9 |
| Motor Vehicle Theft | 7 | 87.3 |
| Arson | 0 | 0 |
| Violent Crime | 5 | 62.4 |
| Robbery | 2 | 25 |
| Aggravated Assault | 2 | 25 |
| Rape | 1 | 12.5 |
| Murder | 0 | 0 |
The chart omits 2021 rather than drawing an unsupported zero or partial-coverage dip. The table preserves the year and marks the gap.
Lead series · rose across 4 comparable years · FBI UCR
Secondary series · fell · 2020-2024 · FBI UCR
| Year | Coverage | Population | Violent Rate | Property Rate |
|---|---|---|---|---|
| 2020 | Comparable | 8,029 | 161.9 | 4932.1 |
| 2021 | Insufficient reporting | 8,054 | - | - |
| 2022 | Comparable | 8,014 | 0 | 686.3 |
| 2023 | Comparable | 7,964 | 50.2 | 6868.4 |
| 2024 | Comparable | 8,015 | 62.4 | 6325.6 |
Oak Brook's crime figures on this page originate from Oak Brook 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 Oak Brook in population. Their populations run from 7,813 to 8,150, against 8,015 here. Or use our side-by-side compare tool to benchmark two cities directly.
These Illinois cities report the closest violent-crime rates to Oak Brook's 62.4/100K (same FBI UCR vintage rules; size peers above are excluded so the two lists stay distinct).
Small-city read: Oak Brook 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 Oak Brook's small city row is sourced and ranked.
Source: FBI Uniform Crime Reporting (UCR) Program CIUS Table 8 municipal crime rates · 2024 Oak Brook, 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. Oak Brook is scored as a small-city UCR reporter (8,015 on the row). See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.