Maryland counties and independent cities
Every county or independent city in Maryland, with the ZIP codes recorded in each. Pick one to see its full ZIP code list.
- counties and independent cities
- 24
- ZIP codes
- 605
All Maryland counties and independent cities
| County or independent city | ZIP codes | Largest city |
|---|---|---|
| Allegany County | 22 | Cumberland |
| Anne Arundel County | 43 | Annapolis |
| Baltimore city | 39 | Baltimore |
| Baltimore County | 53 | Towson |
| Calvert County | 14 | Barstow |
| Caroline County | 11 | Bethlehem |
| Carroll County | 13 | Westminster |
| Cecil County | 17 | Elkton |
| Charles County | 24 | Waldorf |
| Dorchester County | 16 | Cambridge |
| Frederick County | 31 | Frederick |
| Garrett County | 9 | Accident |
| Harford County | 21 | Bel Air |
| Howard County | 22 | Columbia |
| Kent County | 9 | Betterton |
| Montgomery County | 76 | Silver Spring |
| Prince George's County | 64 | Bowie |
| Queen Anne's County | 13 | Barclay |
| Somerset County | 11 | Westover |
| St. Mary's County | 29 | Abell |
| Talbot County | 15 | Bozman |
| Washington County | 23 | Hagerstown |
| Wicomico County | 18 | Salisbury |
| Worcester County | 12 | Ocean City |
Scope every county-equivalent recorded in Maryland. Source Census 2024 county Gazetteer (2024 Gazetteer) and GeoNames US postal codes (2026-07 postal dump). Updated . Names and boundaries follow the Census Bureau's current county-equivalent set, not the MD postal source's older names.