21521 is zip code located in Barton, Maryland. The population is 1,498, making 21521 the largest zipcode in Barton and the 9th largest in Allegany County.
There are 0 public schools in 21521 with an average Homefacts rating of NA. , and there are 3 registered sex offenders residing in the zip code 21521. Unemployment in 21521 is high.