Ridgely is a town in Caroline County, Maryland, United States. The population was 1,352 at the 2000 census. Its main ZIP code is 21660, but is assigned eight other "216" zip codes due to its status as a home to fulfillment companies that receive and ship mail-in offers. The primary phone exchange is 634 and the area code is 410. Maryland Route 480 bisects the town. Pelican Airport serves the area also.