The Safest and Most Dangerous Places in Diamond Bar, CA
Diamond Bar is a city of 53,200 in Los Angeles County, about 25 miles east of downtown Los Angeles · Updated November 2026
Is Diamond Bar, CA safe?
Yes. An overall CrimeGrade™ of A- means crime in Diamond Bar is low. Most US neighborhoods have little crime too, so Diamond Bar sits near the middle: 51% of Americans live in neighborhoods with more crime, and 49% in neighborhoods with less. Violent crime grades better than property crime here, A against B+. Its neighborhoods are much alike, from A to B+; see the map below.
A-
Overall CrimeGrade™
Safety score 841 of 1,000About as safe as the typical US neighborhoodi What this means
51% of Americans live in neighborhoods with more crime than Diamond Bar as a whole, and 49% in neighborhoods with less. The typical US neighborhood has a safety score of 838, a CrimeGrade™ of A-. Diamond Bar scores 841.
Crime is concentrated in a small share of places, so most neighborhoods score high on the 0 to 1,000 scale. That is why a score in the 800s can still mean more crime than most US neighborhoods.
How to read the map: each area's color compares its crime with the people, homes and cars there, on one national scale, from green for the least crime to red for the most. Each area gets its own color, so a busy shopping center can show red while the homes beside it stay green. The interactive maps load faster on a strong connection. Compare high speed internet in Diamond Bar, CA at ISP Reports.
Who this page is for: homeowners and renters in Diamond Bar, and anyone thinking about buying or renting a home there.
Business and enterprise customers: this free map shows neighborhood areas. CrimeGrade™ business reports map crime at about 66-meter detail and estimate it for one address and type of business. See business reports
What stands out in Diamond Bar
Burglary is the exception. Diamond Bar grades B+ for property crime, but burglary grades D+, worse than in the neighborhoods where 96% of Americans live.
Aggravated assaults and simple assaults both run low. In Diamond Bar, each runs at a small fraction of the US rate: 0.57 aggravated assaults and 1.6 simple assaults a year per 1,000 residents, against 2.6 and 9.7 nationally.
The safest and least safe parts of Diamond Bar
Every part of Diamond Bar where people live grades A or B on the national scale. Grades across Diamond Bar run from A to B+; 64% of residents live in areas with less crime than the typical US neighborhood.
100%
A or B 100%
Share of residents, by the overall CrimeGrade™ of the area they live in.
Within Diamond Bar, the southeast side has the least crime and the west side the most.
Is crime going up in Diamond Bar?
Since 2019, reported violent crime in Diamond Bar is down 41% and property crime is up 11%. Murders, rapes, robberies and aggravated assaults went from about 1.3 to 0.8 a year per 1,000 residents (US: 3.7); burglaries, thefts and vehicle thefts from about 16 to 18 (US: 18). In 2024 alone, violent crime fell 43%.
Violent crime, change since 2019
Property crime, change since 2019
Diamond BarUnited States
Source: crime reports to the FBI from the police department that serves Diamond Bar. The charts follow crimes per resident.
Data table
Year
Violent, Diamond Bar
Violent, US
Property, Diamond Bar
Property, US
2016
-10%
+4%
+1%
+15%
2017
-22%
+4%
+13%
+12%
2018
-20%
+0%
+2%
+4%
2019
+0%
+0%
+0%
+0%
2020
-13%
+4%
-12%
-8%
2021
+19%
+6%
-8%
-10%
2022
+34%
+5%
+12%
-6%
2023
+3%
+2%
+17%
-7%
2024
-41%
-4%
+11%
-15%
Crime rates and types in Diamond Bar
CrimeGrade™ estimates Diamond Bar has about 23 reported crimes a year for every 1,000 residents, 37% less than the US as a whole and 41% less than California.
Overall crime
Violent crime
Property crime
Reported crimes a year, per 1,000 residents. These figures include simple assaults and vandalism, which the FBI's violent and property crime rates leave out.
Theft makes up about 43% of crime reported in Diamond Bar. Burglary is less common but costs more, because each one does more harm.
Each CrimeGrade™ compares a crime with what it affects: people for assaults and robbery, homes for burglary, parked cars for vehicle theft. Rates count crimes per 1,000 residents.
The Diamond Bar Police Department reports to the FBI in a format that leaves out vandalism, so CrimeGrade™ makes its own vandalism estimate.
Select a crime's name to see its map above. CrimeGrade™ business reports map each crime at about 66-meter detail.
How Diamond Bar compares with nearby cities
Diamond Bar has less crime than 7 of its 9 nearest cities; only Chino Hills and Brea have less.
Shops, parking lots and walkability in Diamond Bar
Two things set Diamond Bar apart: it has 7.0 stores and restaurants for every 1,000 residents, against 10.5 nationally, and 0.9 parking-lot spaces per resident, against 2.0 nationally. Places like that tend to report less theft, yet theft runs higher here than that would suggest.
Stores and restaurantsShops and restaurants draw crowds and parked cars. Places with many stores tend to report more theft.7.0 per 1,000 residentsUS: 10.5Lower than for 81% of US city residents
Parking lotsBig lots at stores, offices and apartment complexes. Places with more lot space tend to report more theft.0.9 spaces per residentUS: 2.0Lower than for 79% of US city residents
Walk GradeBestNeighborhood's grade for getting through daily life on foot, traced along real walking routes to shops, schools and parks. Walkable places tend to report more theft and assault. 94% of residents here live in car-dependent areas.D- (11 of 100)US: 21Lower than for 74% of US city residents
Show all 6
Lit at nightSatellite images show which neighborhoods are lit at night, a sign of busy streets and businesses. Brightly lit places tend to report more theft and vandalism.100% where people liveUS: 78%Higher than for 73% of US city residents
Empty homesSeasonal and vacation homes are left out. Places with many empty homes tend to report more burglary, vandalism and arson.4.7% of homesUS: 7.1%Lower than for 63% of US city residents
JobsJobs draw daytime crowds. Places with many jobs tend to report more theft and robbery.37 for every 100 residentsUS: 45Lower than for 59% of US city residents
These traits tend to go with more or less crime; none of them causes it on its own. Sources: Census job counts and housing figures, OpenStreetMap and Overture business listings, CrimeGrade™ parking estimates, NASA night-light imagery, US Forest Service tree cover, EPA transit data and BestNeighborhood's Walk Grade.
What crime costs Diamond Bar
Crime costs Diamond Bar about $662 a year per household, counting police, courts and prisons as well as victims' losses, 45% less than the US figure of $1,205.
Cost of crime per resident, per year
Counting the pain and suffering of victims, which comes almost entirely from violent crime, the full cost comes to about $26 million a year, or $494 per resident.
How the cost breaks down
Crime
Cost a year
Per resident
Murder
$1.3 million
$24
Rape
$440,000
$8
Robbery
$480,000
$9
Assault
$1.5 million
$28
Burglary
$3.1 million
$58
Theft
$2.7 million
$51
Vehicle theft
$1.2 million
$22
Arson
$88,000
$2
Vandalism
$1.1 million
$20
Total
$12 million
$222
How CrimeGrade™ works
A CrimeGrade™ shows how much crime an area has compared with the rest of the country, from A+ for the least crime to F for the most. Every neighborhood in the US is graded on the same scale, so a B in Diamond Bar means the same as a B anywhere else.
CrimeGrade™ starts from the crimes people report to police and measures each kind of crime against what it affects: people for assaults, homes for burglaries, parked cars for car thefts.
The rates on this page count crimes for every 1,000 people who live here, the way police departments report them. Diamond Bar is the other kind of example: few people work in, shop in or visit it, so its crime per resident looks lower than its CrimeGrade™ suggests.
Comparisons with US neighborhoods use the Census Bureau's block groups, small areas of about 1,400 residents, and count the people who live in each. The figures count crimes reported to police; many crimes, shoplifting above all, never are. Behind the grades, CrimeGrade™ tested 21,607 factors from 125 data families. For business owners, paid CrimeGrade™ location reports estimate crime at a single address for each type of business.
Where the numbers come from
Crime reports that police departments file with the FBI
State crime records and city crime data, where they are published
Published research on what crime costs victims and communities
These are estimates of reported crime for whole areas, not a record of what happened on any one street. CrimeGrade™ updates them once a year and provides them free and without guarantee. Check local sources before you rely on them for a decision.
Schools in Diamond Bar, CA average a SchoolGrade of A: 54% of students test proficient, against 46% projected for schools like them. Overall, they greatly exceed expectations. See schools in Diamond Bar on SchoolGrade
