03809 is zip code located in Alton, New Hampshire. The population is 3,503, making 03809 the 2nd largest zipcode in Alton and the 7th largest in Belknap County.
There are 2 public schools in 03809 with an average Homefacts rating of B-. The total crime rate for Alton is very high , and there are 9 registered sex offenders residing in the zip code 03809. Unemployment in 03809 is low.