U.S. postal lookup

U.S. ZIP Codes Database 2026

Search by ZIP code, city, county, or state and find clear postal details with maps, time zones, and area code data.

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ZIP Code Details for Frederick

Detailed geographic and postal record lookup for the city of Frederick.

Postal Information

ZIP Code 15333
Type Standard
Primary City Fredericktown
State PA
County Washington County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 724, 878
Latitude 40,02° N
Longitude -80,03° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Fredericktown, PA

Postal Information

ZIP Code 17026
Type Standard
Primary City Fredericksburg
State PA
County Lebanon County
Acceptable Cities Fredericksbrg
Unacceptable -
Time Zone America/New_York
Area Codes 223, 717
Latitude 40,45° N
Longitude -76,42° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Fredericksburg, PA

Postal Information

ZIP Code 19435
Type Standard
Primary City Frederick
State PA
County Montgomery County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 484, 610, 835
Latitude 40,33° N
Longitude -75,57° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Frederick, PA

Postal Information

ZIP Code 20678
Type Standard
Primary City Prince Frederick
State MD
County Calvert County
Acceptable Cities Dares Beach, Prnc Frederck
Unacceptable Pr Frederick
Time Zone America/New_York
Area Codes 227, 240, 301, 410, 443, 667
Latitude 38,54° N
Longitude -76,58° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Prince Frederick, MD

Postal Information

ZIP Code 21701
Type Standard
Primary City Frederick
State MD
County Frederick County
Acceptable Cities Lewistown
Unacceptable Hood College
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,42° N
Longitude -77,41° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Frederick, MD

Postal Information

ZIP Code 21702
Type Standard
Primary City Frederick
State MD
County Frederick County
Acceptable Cities Fort Detrick
Unacceptable College Estates
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,48° N
Longitude -77,46° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Frederick, MD

Postal Information

ZIP Code 21703
Type Standard
Primary City Frederick
State MD
County Frederick County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,37° N
Longitude -77,47° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Frederick, MD

Postal Information

ZIP Code 21704
Type Standard
Primary City Frederick
State MD
County Frederick County
Acceptable Cities Urbana
Unacceptable -
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,35° N
Longitude -77,38° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Frederick, MD

Postal Information

ZIP Code 21705
Type Po Box
Primary City Frederick
State MD
County Frederick County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,41° N
Longitude -77,41° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Frederick, MD

Postal Information

ZIP Code 21709
Type Unique
Primary City Frederick
State MD
County Frederick County
Acceptable Cities -
Unacceptable State Farm Ins Co
Time Zone America/New_York
Area Codes 240
Latitude 39,42° N
Longitude -77,41° W

About U.S. ZIP Codes

U.S. ZIP Codes are 5-digit postal codes introduced in 1963 by the USPS to improve mail sorting efficiency. The first digit represents a broad region, the next two identify a sectional center facility, and the final two help pinpoint a local post office or delivery area.

Geographic Breakdown:

  • 1st Digit: Represents a group of states or a broad national region.
  • 2nd/3rd Digits: Represent a regional area or large city.
  • 4th/5th Digits: Identify specific post offices or delivery zones.

ZIP Codes support physical delivery, routing analytics, geocoding, tax calculations, and location-based research.

Geographic Map of Frederick, MD

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Postal context

About U.S. ZIP Codes

ZIP codes are a United States Postal Service system introduced in 1963 to make mail routing more accurate and efficient. The standard format uses five digits, while ZIP+4 adds four more digits for a more precise delivery segment.

ZIP codes cover the United States, its territories, military mail routes, and other USPS delivery points. This directory organizes that data for practical lookup by ZIP code, city, county, and state.