ZIP CodesMaryland ZIP codes: every city, town and county
605 ZIP codes of Maryland (MD), listed by place and by county. Every code of the state starts with 2.
Maryland at a glance
- ZIP codes in this list
- 605
- Lowest and highest
- 20588 to 21930
- First digit
- 2
- Three-digit prefixes
- 14, from 205 to 219
- Counties or equivalent areas
- 24
- Places named
- 431
- Most codes for one place
- Baltimore (42)
- Largest ZIP code area
- 21550 Oakland, 205 sq mi
By county
- Allegany County 22
- Anne Arundel County 43
- Baltimore (city) 39
- Baltimore County 53
- Calvert County 14
- Caroline County 11
- Carroll County 13
- Cecil County 17
- Charles County 24
- Dorchester County 16
- Frederick County 31
- Garrett County 9
- Harford County 21
- Howard County 22
- Kent County 9
- Montgomery County 76
- Prince George's County 64
- Queen Anne's County 13
- Somerset County 11
- St. Mary's County 29
- Talbot County 15
- Washington County 23
- Wicomico County 18
- Worcester County 12
By city or town
No place in Maryland matches. Try fewer letters, or the look-up for the whole country.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. Not connected with the United States Postal Service; for mailing, confirm the address with USPS.