Photo: cwwycoff1 · CC BY 2.0Marengo sits close to the middle of U.S. towns for reported crime
Overall, Marengo grades C+ for safety: close to the middle of U.S. towns, on crimes its police reported to the FBI in 2023–2025.
Crimes reported to the FBI per 1,000 residents a year, 2023–2025. “Rest of IA” is every other Iowa city and town in the FBI’s tables; the U.S. figure is the FBI’s national estimate as published, averaged over the three years. The FBI publishes no national homicide or robbery rate in our data, so those compare with all U.S. cities and towns in its tables.
What’s behind Marengo’s grade
Property crimes plus four times violent crimes reported to the FBI per resident, 2023–2025, on a national curve. Both violent and property crime are higher than in most U.S. towns; violent crime is the closer of the two to typical. Its violent rate (1.9) is below the FBI’s national estimate (3.6) but higher than in most individual towns: the national figure is weighted by people, and the grade counts towns. Its property rate (13.3) is below the FBI’s national estimate (17.6) but higher than in most individual towns: the national figure is weighted by people, and the grade counts towns.
Violent crime, by year and by type
Marengo’s police reported 14 violent crimes to the FBI over 2023–2025, about 1.9 per 1,000 residents a year, against 3.2 in the rest of Iowa and the FBI’s national estimate of 3.6.
Show as a table
| Year | Marengo | Rest of Iowa | U.S. (FBI national estimate) |
|---|---|---|---|
| 2022 | 3.3 | 3.7 | 4.0 |
| 2023 | 1.7 | 3.6 | 3.9 |
| 2024 | 1.7 | 3.1 | 3.6 |
| 2025 | 2.5 | 2.9 | 3.3 |
Violent crimes per 1,000 residents
By type 2023–2025, counts
For every 1,000 residents, about 7 property crimes reported
And about 3 violent crimes, in 2025. Below are 1,000 dots, one per resident; each colored dot is one reported crime.
Violent crime per 1,000 residents, 2025
Property crime per 1,000 residents, 2025
Crimes reported to police in 2025 per resident; one person can be the victim of more than one, and some reports involve visitors.
Reported crime is steady
Reported crime per resident was steady from 2023 to 2025: the change is within ordinary year-to-year swings. Per 1,000 residents, 2022–2025, against the rest of Iowa.
Show as a table
| Year | Marengo property | Rest of Iowa property | Marengo violent | Rest of Iowa violent |
|---|---|---|---|---|
| 2022 | 14.9 | 19.2 | 3.3 | 3.7 |
| 2023 | 20.0 | 20.0 | 1.7 | 3.6 |
| 2024 | 13.0 | 17.9 | 1.7 | 3.1 |
| 2025 | 7.1 | 15.8 | 2.5 | 2.9 |
Crimes per 1,000 residents
23 crimes reported in 2025
6 violent and 17 property, as reported to the FBI by Marengo’s police.
2025 offenses reported
Offenses reported to police, not convictions. FBI Uniform Crime Reporting. The last row is counted outside the property total.
No one died in a crash on Marengo’s roads in 2019–2023
That is about what is typical for Iowa towns of 2,500–5,000 people: at their median rate (0.0 deaths per 100,000 residents a year), a town of Marengo’s size would see about 0 in five years. With numbers this small, a death or two either way changes the picture, so Marengo’s own rate (0.0) is context, not a ranking.
Deaths are counted where the crash happened, not where the people lived: a highway through town adds through-traffic deaths, and residents’ own risk on roads elsewhere isn’t here. Town rates sit below state and U.S. rates because a third of fatal crashes happen outside any town. Road safety is described here and is not part of the Safety Grade. Source: NHTSA Fatality Analysis Reporting System (FARS), 2019–2023.
Marengo and its neighbors
How reported crime compares across the town line. Tap a town to see its safety page.
| Town | Grade | Violent | Property |
|---|---|---|---|
| Marengo | C+ | 1.9 | 13.3 |
Crimes reported to the FBI per 1,000 residents a year, 2023–2025.
Iowa towns of a similar size
| Town | Grade | Violent | Property |
|---|---|---|---|
| Marengo | C+ | 1.9 | 13.3 |
| Colfax | A | 1.0 | 2.0 |
| Missouri Valley | B | 2.0 | 8.3 |
| Postville | B− | 2.9 | 5.4 |
| Belle Plaine | C− | 4.3 | 15.0 |
| Eldora | D− | 22.9 | 8.8 |
The five graded Iowa towns closest to Marengo’s population (2,425), by grade.
What this data can and can’t tell you
- It’s reported crime. Only incidents reported to and recorded by police appear here. Many crimes are never reported to police.
- One number for all of Marengo. A town-wide rate doesn’t show where incidents happen, and that can differ a lot from one part of town to another.
- Visitors count too. Incidents involving people who work, shop or visit are counted against Marengo’s residents, which raises the per-resident rate.
- Whose population. Rates use the FBI’s population for the department (2,409 in 2025); our figure for Marengo is 2,425 (2025 Census estimate).
- Gaps are real gaps. A missing year means the department didn’t report a full year, not that nothing happened.
How the grade is calculated, for every town: How TownRatings grades safety →
Questions about safety in Marengo
Is Marengo, IA safe?
On crimes reported to the FBI in 2023–2025, Marengo reports more crime per resident than 56% of U.S. towns, a C+ Safety Grade. Its police reported 1.9 violent crimes per 1,000 residents a year, against 3.2 in the rest of Iowa and the FBI’s national estimate of 3.6.
What is the crime rate in Marengo?
1.9 violent and 13.3 property crimes per 1,000 residents a year, 2023–2025, as reported to the FBI. The rest of Iowa reports 3.2 and 17.9; the FBI’s national estimate is 3.6 and 17.6.
Is crime going up or down in Marengo?
Reported crime per resident was steady from 2023 to 2025: the change is within ordinary year-to-year swings.
Who polices Marengo?
Marengo’s own police department, which reports to the FBI as “Marengo”. Its figures are the ones on this page.
Heads-up board
Neighbors looking out for each other in Marengo.
Your answer becomes a post in Town Square.
Please don’t name or describe individuals. In an emergency, call 911.
Crime: FBI Uniform Crime Reporting Program, Crime Data Explorer: offenses known to law enforcement by city, 2025, and state and national rates. Counts are crimes reported to police, not convictions. The Safety Grade is our own summary of that data, not an official rating. Road deaths: NHTSA Fatality Analysis Reporting System (FARS), 2019–2023. This isn’t an official statement of public safety. In an emergency, call 911.