Zip Codes of Maryland, United States

Explore the Zip Codes structure of Maryland. This part of United States is organized into 23 administrative areas, each serving as a vital link in the regional logistics network. Our directory helps you navigate these districts to find precise geographic identifiers for efficient mail routing and local delivery.

Regions of Maryland

Allegany

Hierarchy of Zip Codes in Maryland

Explore the Maryland postal structure. This region in United States is divided into several administrative districts, each with its own unique Zip Codes range. Select a sub-region below to find specific codes for cities, municipalities, and local streets. Accurate geographic data for Maryland is essential for precise mail routing and logistics management in this area.

Popular Zip Codes

Code	Locality	Region
21401	Annapolis	Anne Arundel
21402	Annapolis	Anne Arundel
21201	Baltimore	Baltimore
21202	Baltimore	Baltimore
21701	Frederick	Frederick
21702	Frederick	Frederick
20810	Bethesda	Montgomery
20811	Bethesda	Montgomery
20877	Gaithersburg	Montgomery
20878	Gaithersburg	Montgomery
20847	Rockville	Montgomery
20848	Rockville	Montgomery