Crime Grade · FBI UCR Data · 2024
Diamond Bar, CA Crime Grade
How Diamond Bar grades for violent crime against every other reporting U.S. city — and against the rest of California — based on the FBI's Uniform Crime Reporting data.
National
3/10
vs. all U.S. cities ≥ 25,000 population
California
1/10
vs. California cities ≥ 10,000 population
In 2024, the violent crime rate in Diamond Bar, CA was 78.2 per 100,000 residents (40 incidents over a population of 51,126). That puts Diamond Bar Infinity% above the U.S. rate of 0.0 and 84% below the California statewide rate of 478.7.
That ranks Diamond Bar #871 of 3,771 ranked U.S. cities, safer than 77% of them, and #16 of 371 in California. Violent crime is down 42% year over year and down 39% over the last five years.
Diamond Bar, CA crime — key facts
- National Crime Grade
- A (3/10)
- California Grade
- A (1/10)
- Violent crime rate
- 78.2 / 100k
- National rank
- #871 of 3,771
- CA rank
- #16 of 371
- Safer than
- 77% of U.S. cities
- Year over year
- down 42%
- 5-year change
- down 39%
- Population
- 51,126
- Reporting agency
- Diamond Bar Police Department
- Data year
- 2024 · FBI UCR
Reported by Diamond Bar Police Department (FBI ORI CA0191W0X) to the FBI Uniform Crime Reporting Program. Download the full dataset (CSV) · methodology.
Violent crime rate, 5-year trend
Per 100,000 residents. Diamond Bar (red), California (blue), U.S. average (gray dashed).
Diamond Bar vs. U.S., 2024 — by offense
Rates per 100,000 residents for each offense category.
Full data, last 5 years
Rates per 100,000 residents. Raw counts in parentheses.
| Offense | 2019 | 2020 | 2022 | 2023 | 2024 |
|---|---|---|---|---|---|
| Violent crime | 127.7(72) | 111.2(62) | 174.5(92) | 135.0(70) | 78.2(40) |
| Murder | 1.8(1) | 0.0(0) | 0.0(0) | 3.9(2) | 0.0(0) |
| Rape | 7.1(4) | 12.6(7) | 24.7(13) | 17.4(9) | 9.8(5) |
| Robbery | 44.4(25) | 30.5(17) | 47.4(25) | 40.5(21) | 21.5(11) |
| Aggravated assault | 74.5(42) | 68.2(38) | 102.4(54) | 73.3(38) | 46.9(24) |
| Property crime | 1614.5(910) | 1430.0(797) | 1843.9(972) | 1933.9(1,003) | 1867.9(955) |
| Burglary | 500.3(282) | 423.4(236) | 485.6(256) | 553.4(287) | 676.8(346) |
| Larceny | 1018.4(574) | 846.9(472) | 1164.8(614) | 1176.2(610) | 1040.6(532) |
| Motor vehicle theft | 92.3(52) | 152.5(85) | 187.8(99) | 202.5(105) | 144.7(74) |
How the Crime Grade is calculated
- What is the source of the Diamond Bar, CA Crime Grade?
- FBI Uniform Crime Reporting via the Crime Data Explorer. Agency-level data, pulled directly. No third-party aggregators, no proprietary score.
- What metric does the Diamond Bar Crime Grade use?
- Violent crime rate per 100,000 residents (murder + rape + robbery + aggravated assault), most recent fully-reported year.
- How is the national decile for Diamond Bar calculated?
- Diamond Bar's rate placed against all FBI-reporting U.S. cities with population ≥ 25,000. 1 = safest.
- How is the California state decile calculated?
- Same calculation restricted to California cities with population ≥ 10,000.
- How do decile scores convert to a letter grade?
- 1–3 = A · 4–5 = B · 6–7 = C · 8 = D · 9–10 = F.
- How often is the Diamond Bar Crime Grade refreshed?
- Twice a year. The FBI typically releases the prior year's full data each September.
- What are the limits of this Crime Grade?
- The FBI relies on local agency reporting. Rates reflect what was reported, not what occurred.
Nearby cities in California
Comparable California cities by population.
Compare Diamond Bar to other places
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