91001 is zip code located in Altadena, California. The population is 38,066, making 91001 the largest zipcode in Altadena.
There are 10 public schools in 91001 with an average Homefacts rating of C+. , and there are 12 registered sex offenders residing in the zip code 91001. Unemployment in 91001 is very high.
Zip codes within Altadena include 91003.