Crime Score for ZIP 21409, Arnold, MD
Arnold · July 2026 snapshot · powered by SpotCrime
Lower crime than 71.48% of US ZIP codes
National rank
#7,775
of 13,225 scored ZIPs
Maryland rank
#271
of 352 in state
Score index
42.8
crime intensity
Snapshot
July 2026
updated monthly
ZIP code 21409 covers part of Arnold in Maryland. In July 2026 it scored in the 28.5th percentile for reported crime among 13,225 scored US ZIP codes. That is a Below Average rating, below the national midpoint for reported crime.
Nationally it ranks #7,775, where #1 is the highest-crime ZIP in the country. Within Maryland it ranks #271 of 352. That is 39.3 points below the Maryland median of 67.8. It rose 5.90 percentile points between June 2026 and July 2026, from 22.62 to 28.52.
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) | 28.52 | #7,775 | #271 |
| June 2026 | 22.62 | #9,378 | #296 |
Nearby ZIP codes
1 of 6 score lower than 21409. Closest scored ZIPs by distance.
County
County not available.
On SpotCrime
The score on this page is built from the same incident reports SpotCrime maps.
Questions about 21409
- Is ZIP code 21409 safe?
- CrimeScore does not label places safe or unsafe. ZIP 21409 scores in the 28.5th percentile for reported crime as of July 2026, which is a Below Average rating: below the national midpoint for reported crime.. Scores reflect police reports, so areas with less reporting can look calmer than they are.
- How is the crime score for 21409 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 21409 compare with the rest of Maryland?
- It ranks #271 of 352 scored ZIP codes in Maryland, against a state median of the 67.8th percentile. Nationally it ranks #7,775 of 13,225.
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Data: CrimeScore by SpotCrime, July 2026 publication. Scores describe areas, not people, and are not predictions. Terms.