Crime Score for ZIP 91104, Altadena, CA
Altadena · Los Angeles County · July 2026 snapshot · powered by SpotCrime
Higher crime than 84.19% of US ZIP codes
National rank
#1,720
of 13,225 scored ZIPs
California rank
#225
of 1500 in state
Score index
143.6
crime intensity
Snapshot
July 2026
updated monthly
ZIP code 91104 covers part of Altadena in Los Angeles County, California. In July 2026 it scored in the 84.2th percentile for reported crime among 13,225 scored US ZIP codes. That is a High Crime rating, in the top quarter of scored ZIP codes for reported crime.
Nationally it ranks #1,720, where #1 is the highest-crime ZIP in the country. Within California it ranks #225 of 1500. That is 31.5 points above the California median of 52.7. It rose 3.81 percentile points between June 2026 and July 2026, from 80.38 to 84.19.
Higher percentile and a lower rank number both mean more reported crime. Levels are fixed cutoffs on the percentile: Low under 25, Below Average to 50, Above Average to 75, High to 90, Very High to 99, Extreme above. Scores reflect incidents reported by police and published by SpotCrime, so they measure reported crime, not every event that happens.
Monthly history
| Month | Percentile | National rank | State rank |
|---|---|---|---|
| July 2026(latest) | 84.19 | #1,720 | #225 |
| June 2026 | 80.38 | #2,379 | #314 |
Nearby ZIP codes
4 of 6 score lower than 91104. Closest scored ZIPs by distance.
On SpotCrime
The score on this page is built from the same incident reports SpotCrime maps.
Questions about 91104
- Is ZIP code 91104 safe?
- CrimeScore does not label places safe or unsafe. ZIP 91104 scores in the 84.2th percentile for reported crime as of July 2026, which is a High Crime rating: in the top quarter of scored ZIP codes for reported crime.. Scores reflect police reports, so areas with less reporting can look calmer than they are.
- How is the crime score for 91104 calculated?
- SpotCrime collects police incident reports for the area, weights them into a crime intensity index, and ranks that index against every scored US ZIP code to get a percentile. The score is republished monthly and carries a model hash so you can tell which version produced it.
- How does 91104 compare with the rest of California?
- It ranks #225 of 1500 scored ZIP codes in California, against a state median of the 52.7th percentile. Nationally it ranks #1,720 of 13,225.
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Data: CrimeScore by SpotCrime, July 2026 publication. Scores describe areas, not people, and are not predictions. Terms.