20634 is zip code located in Great Mills, Maryland. The population is 6,252, making 20634 the largest zipcode in Great Mills and the 6th largest in St. Marys County.
There are 3 public schools in 20634 with an average Homefacts rating of B-. , and there are 15 registered sex offenders residing in the zip code 20634. Unemployment in 20634 is moderate.