02451 is zip code located in Waltham, Massachusetts. The population is 16,573, making 02451 the 2nd largest zipcode in Waltham.
There are 2 public schools in 02451 with an average Homefacts rating of C. The total crime rate for Waltham is low , and there are 2 registered sex offenders residing in the zip code 02451. Unemployment in 02451 is moderate.