How do I find a ZIP code by city or state?

You can find ZIP codes by city or state using our search tool. Just enter the city or state name, and you'll see all related ZIP codes instantly.

What is a ZIP+4 code?

A ZIP+4 code adds four digits to the basic five-digit ZIP code. It helps the USPS deliver mail more precisely to specific addresses or buildings.

Are ZIP codes the same as postal codes?

ZIP codes are the U.S. version of postal codes, used by the USPS to identify delivery areas. Other countries use postal codes with different formats.

Complete ZIP Codes For Frederick, Maryland

Browse Frederick ZIP Codes

ZIP Codes in Frederick County help organize mail delivery and define local service areas. Each ZIP Code corresponds to a specific community or post office, ensuring residents, businesses, and visitors can find accurate address information quickly. By browsing the complete list of Frederick ZIP Codes, you can easily identify the correct code for mailing, business, or geographic purposes.

Frederick

Post Office	Frederick
Division	Frederick
Pincode	21702

Frederick

Post Office	Frederick
Division	Frederick
Pincode	21701

Frederick

Post Office	Frederick
Division	Frederick
Pincode	21703

Mount Airy

Post Office	Mount Airy
Division	Frederick
Pincode	21771

Frederick

Post Office	Frederick
Division	Frederick
Pincode	21704

New Market

Post Office	New Market
Division	Frederick
Pincode	21774

Total Post Offices (32) Page 1 of 6
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Cities in Frederick

27 cities in Frederick County | List of ZIP Codes in Maryland

ZIP codes in Frederick County, Maryland not only facilitate mail delivery but also provide important demographic and geographic insights. Each ZIP code corresponds to specific areas within the county, helping businesses, residents, and researchers understand population distribution, city locations, and service coverage across Frederick County.

Businesses and service providers rely on accurate ZIP code information in Frederick County to plan deliveries, target customers, and ensure timely services. By referencing the full list of ZIP codes, companies can optimize logistics and outreach, while residents can easily identify the correct postal codes for their addresses within Maryland.

Knowing the correct ZIP codes in Frederick County ensures fast and accurate mail delivery from the United States Postal Service (USPS). It also helps travelers, online shoppers, and local residents navigate efficiently across towns and communities in Frederick County, making ZIP codes an essential part of daily life and business operations.