Marion, IA has a A safety grade (83/100) with a violent crime rate of 123 per 100,000, 65% below the national average.
FBI UCR 2024 · per-capita rates · mid-size city
Marion (42,420 people) sits in the mid-size municipal band. This page opens with per-100,000 FBI UCR rates, then IA and national benchmarks.
Data updated 2026-08-24
Marion, IA carries a PlainCrime A safety grade with violent crime 65% below the U.S. average
According to the FBI Uniform Crime Reporting (UCR) Program for 2024, Marion, IA shows violent crime at 122.6 per 100,000 residents and property crime at 497.4 per 100,000. Violent crime runs 65% 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.
Comparable rate records
The nearest comparable 2024 records to Marion's 122.6 violent-crime rate per 100,000 are Denison (124.4), Le Claire (126.2), Decorah (118.8), Walcott (129.3). 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.
2020–2024 direction
Across 5 comparable reporting years, the rate moved from 161.1 per 100,000 in 2020 to 122.6 in 2024 (-23.9%). The highest observed value was 265.9 in 2021 and the lowest 122.6 in 2024. Years whose submission failed the completeness test are left out of this comparison rather than plotted as change.
Position in the state cohort
At 122.6 reported violent offenses per 100,000 residents in 2024, Marion ranks 88 of 148 — above 60 of the 147 other Iowa cities whose 2024 submission passes this site’s completeness test. That is -16.2% against the cohort median of 146.3. Cities that did not report, or that reported implausibly low totals, are excluded from this cohort rather than counted as low-crime.
Offense mix
Violent offenses are 19.8% of the 263 Part I offenses reported in Marion for 2024, against a median of 15.8% across comparable Iowa cities — a gap of 4.0 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 counts dominate Marion'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.
Mid-size municipal totals above are reported offenses, not safety advice for any single block. Reporting completeness still varies by year and agency.
Across 18 Census sq mi, Marion logged 11.7 property and 2.9 violent offenses per square mile in 2024.
Marion's 2024 book concentrates in larceny-theft (66% of 263 offenses; mix index 4,649).
Violent offenses are 20% of the municipal total; property offenses still dominate the count.
Marion offense mix (2024)
Density uses Census Gazetteer land area (18 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 | 211 | 497.4 |
| Larceny-Theft | 173 | 407.8 |
| Burglary | 28 | 66 |
| Motor Vehicle Theft | 10 | 23.6 |
| Arson | 1 | 2.4 |
| Violent Crime | 52 | 122.6 |
| Aggravated Assault | 35 | 82.5 |
| Rape | 9 | 21.2 |
| Robbery | 6 | 14.1 |
| Murder | 2 | 4.7 |
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 | 40,968 | 161.1 | 1449.9 |
| 2021 | Comparable | 41,370 | 265.9 | 1143.3 |
| 2022 | Comparable | 41,793 | 244.1 | 1237 |
| 2023 | Comparable | 42,000 | 226.2 | 681 |
| 2024 | Comparable | 42,420 | 122.6 | 497.4 |
Marion Police Department filed the 2024 UCR row behind Marion's 263 reported offenses (5-year span 2020-2024).
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 Iowa cities closest to Marion in population. Their populations run from 24,819 to 58,620, against 42,420 here. Or use our side-by-side compare tool to benchmark two cities directly.
Marion sits at 122.6/100K violent (grade A); the Iowa cities below are the nearest matches after size peers are removed.
Marion at 122.6/100K violent and 497.4/100K property - matched below outside Iowa (≥10k pop, latest UCR vintage; not the in-state lists above).
122.6/100K here; nearest out-of-state matches.
497.4/100K here; violent-rate peers above excluded.
Out-of-state cities whose violent rate moved a similar share from 2023→2024 (-45.8% here); level-based peers above are excluded.
In 2024, Marion reported 52 violent crimes and 211 property crimes, for a total of 263 reported offenses.
From 2023 to 2024, Marion's violent crime rate decreased by 45.8%, and the property crime rate decreased by 27%.
The most common crime type in Marion is larceny-theft, accounting for 65.8% of all reported crimes (173 incidents in 2024).
Mid-size read: Marion figures are FBI UCR CIUS Table 8 (vintage 2024), population-adjusted per 100,000.
Denominators are the reporting-year population on the municipal row. Incomplete years are dropped from rankings. Confirm at FBI Crime Data Explorer and Census.gov QuickFacts.
Disclaimer (mid-size municipal): figures are informational, not advice. FBI Uniform Crime Reporting (UCR) Program is the source. Consult a professional before decisions.
Mid-size rate methodology for how Marion's mid-size city row is sourced and ranked.
Source: FBI Uniform Crime Reporting (UCR) Program CIUS Table 8 municipal crime rates · 2024 Marion, IA 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. Marion is scored in the mid-size municipal band (42,420 on the row). See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.