21648 is zip code located in Madison, Maryland. The population is 308, making 21648 the 2nd largest zipcode in Madison and the 10th largest in Dorchester County.
There are 0 public schools in 21648 with an average Homefacts rating of NA. , and there are 0 registered sex offenders residing in the zip code 21648. Unemployment in 21648 is very high.
Zip codes within Madison include 21677.