Caroline County ZIP Codes
Maryland, United States · 11 codes
Caroline County in Maryland has 11 ZIP codes, from 21609 to 21670, serving 11 places.
ZIP codes in Caroline
Frequently asked questions
What is the ZIP code of Caroline?
Caroline has 11 ZIP codes, from 21609 to 21670. The table lists the places each one serves.
How many places are listed in Caroline County?
11 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.