21660 is zip code located in Ridgely, Maryland. The population is 4,108, making 21660 the largest zipcode in Ridgely and the 5th largest in Caroline County.
There are 3 public schools in 21660 with an average Homefacts rating of B. The total crime rate for Ridgely is low , and there are 5 registered sex offenders residing in the zip code 21660. Unemployment in 21660 is moderate.