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Crime Rate in Longmont, CO (2025)

The FBI-based Crime Index for Longmont, built from FBI Crime Data Explorer reports for 2025. Scores run 0–100 (higher = safer).

94/100
AVery safe

Crime Index

Population: 99,973
Data year: 2025 · FBI Crime Data Explorer
#1 safest of 19 cities in Colorado
100% of population covered by reporting agencies · updated July 8, 2026

Is Longmont safe?

For 2025, Longmont scores 94/100 on our FBI-based Crime Index — a grade A (very safe), which means it is one of the safer places we track. Its violent-crime rate of 60 per 100k is 0.2× the US average, with every major offense at or below the national rate. It ranks #1 safest of 19 cities in Colorado.

Violent crime
60/100k
0.2× US avg
0.1× CO avg
Property crime
368/100k
0.2× US avg
0.2× CO avg
Homicide
0/100k
0.0× US avg
0.0× CO avg
Total reported
428/100k
0.2× US avg
0.2× CO avg
99%

Safer than 99% of the 759 US cities we track

1 in 1,667

Annual odds of a reported violent crime per resident

1 in 272

Annual odds of a reported property crime per resident

Odds are the reported 2025 rate expressed per resident, city-wide — your actual risk varies by neighborhood, time, and situation.

Treat this year's figure as incomplete. Longmont's reported 2025 crime rate (428 per 100,000) is less than half its own recent average, which almost always means the agency submitted part of the year rather than that crime actually collapsed. We exclude Longmont from our safest and most-dangerous rankings for 2025. The multi-year trend below is the more reliable read — see the methodology.

Crime trend in Longmont

4,1732,0870202120222023202420253,218428
Reported crime per 100,000 residents · hover a year for detail

Reported crime by offense

Each bar is scaled to the US average for that offense — the dashed line marks 1×. Bars past it run above the national norm; hover a row for detail.

Violent crime

Homicideanchor
0.0× US
0
0 total
Rape
0.5× US
16
16 total
Robbery
0.0× US
1
1 total
Aggravated assault
0.2× US
43
43 total

Property crime

Burglary
0.1× US
28
28 total
Larceny-theft
0.3× US
303
303 total
Motor vehicle theft
0.2× US
33
33 total
Arson
0.4× US
4
4 total

Rates shown are per 100,000 residents.

Homicide rate

0per 100k

Homicide anchors the Crime Index — see methodology.

-100% lower than the national homicide rate of 4.12 per 100k.

How Longmont compares

Longmont against the Colorado and US averages for 2025.

MetricLongmontColoradoUnited States
Crime Index (higher = safer)94A62C73C
Violent crime /100k60428315
Property crime /100k3682,1761,487
Homicide /100k03.74.1
Total reported /100k4282,6031,802

Grade shown per index band (88–100 = A … 0–29 = F). Rates are reported offenses per 100,000 residents.

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No area has zero risk

A high Crime Index score means lower reported crime relative to other US cities — it is not a guarantee of safety. Reported crime is not the same as actual crime. Research on the gap between crime that occurs and crime that gets reported to police — often called the "dark figure" of crime — estimates that roughly 40% of violent crime and about a third of property crime go unreported each year. Every index built on official statistics, including this one, necessarily undercounts real crime. That gap is exactly why homicide — the offense with the smallest dark figure — anchors the calculation instead of a more commonly reported but less reliable category like theft.

Scores on this page reflect FBI-reported data for 2025. See the full methodology →

Compare Longmont to other Colorado cities

Ranked by Crime Index — closest to Longmont.

Castle Rock92 AParker82 BBroomfield81 B

Head-to-head comparisons

Longmont vs Castle RockLongmont vs Parker

Frequently asked questions

Is Longmont safe?
Longmont has a Crime Index of 94 out of 100 (grade A — very safe) for 2025, based on FBI-reported violent and property crime rates relative to other US cities. That ranks it #1 of 19 cities in Colorado by reported crime. Reported crime is not the same as actual crime. Research on the gap between crime that occurs and crime that gets reported to police — often called the "dark figure" of crime — estimates that roughly 40% of violent crime and about a third of property crime go unreported each year. Every index built on official statistics, including this one, necessarily undercounts real crime. That gap is exactly why homicide — the offense with the smallest dark figure — anchors the calculation instead of a more commonly reported but less reliable category like theft.
What does a "A" grade mean?
A "Very safe" grade means Longmont's severity-weighted crime rate falls in the 88–100 range on the Crime Index, out of a national distribution of every city we track for 2025. Grades are calibrated against the national distribution of every area we track for the same data year — they describe an area's relative standing, not an absolute promise. A "Very safe" grade means an area sits among the lowest-crime places in the country with usable data, not that nothing ever happens there.
What is the most common crime in Longmont?
The most frequently reported offense in Longmont for 2025 was larceny-theft, with 303 reported incidents. See the full breakdown by offense above for how violent and property crime compare to the US average.
Is crime in Longmont getting better or worse?
There isn't enough multi-year data to state a reliable trend for Longmont.
What are the odds of being a victim of crime in Longmont?
Based on 2025 reported rates, Longmont residents face roughly a 1 in 1,667 annual chance of a violent crime and about 1 in 272 for a property crime, calculated city-wide. Your individual risk varies widely by neighborhood, time of day, and circumstances.
How does Longmont compare to other US cities?
Longmont is safer than 99% of the 759 US cities we track for 2025, ranked by Crime Index. Its violent-crime rate is 0.1× the Colorado average and its property-crime rate is 0.2× the Colorado average.
Does reported crime equal real crime?
No. National research on the dark figure of crime estimates that roughly 40% of violent crime and about a third of property crime are never reported to police, so any index built on official statistics — including this one — measures a floor on real crime, not a ceiling. That's part of why the index leans most heavily on homicide, the category with the smallest reporting gap.
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