03225 is zip code located in Alton, New Hampshire. The population is 3,781, making 03225 the largest zipcode in Alton and the 6th largest in Belknap County.
There are 1 public schools in 03225 with an average Homefacts rating of C+. The total crime rate for Alton is very high , and there are 4 registered sex offenders residing in the zip code 03225. Unemployment in 03225 is low.