21530 is zip code located in Flintstone, Maryland. The population is 1,597, making 21530 the largest zipcode in Flintstone and the 7th largest in Allegany County.
There are 1 public schools in 21530 with an average Homefacts rating of B+. , and there are 2 registered sex offenders residing in the zip code 21530. Unemployment in 21530 is high.