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U.S. ZIP Codes Database 2026

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ZIP Code Details for Rockville

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

Postal Information

ZIP Code 20852
Type Standard
Primary City Rockville
State MD
County Montgomery County
Acceptable Cities N Bethesda, North Bethesda
Unacceptable No Bethesda
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,05° N
Longitude -77,12° 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 Rockville, MD

Postal Information

ZIP Code 20853
Type Standard
Primary City Rockville
State MD
County Montgomery County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,1° N
Longitude -77,09° 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 Rockville, MD

Postal Information

ZIP Code 20857
Type Unique
Primary City Rockville
State MD
County Montgomery County
Acceptable Cities -
Unacceptable Hhs
Time Zone America/New_York
Area Codes 240
Latitude 39,08° N
Longitude -77,15° 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 Rockville, MD

Postal Information

ZIP Code 23146
Type Standard
Primary City Rockville
State VA
County Hanover County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 804
Latitude 37,72° N
Longitude -77,67° 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 Rockville, VA

Postal Information

ZIP Code 47872
Type Standard
Primary City Rockville
State IN
County Parke County
Acceptable Cities Judson
Unacceptable Catlin, Coloma, Guion, Hollandsburg, Mansfield, Milligan, Nyesville
Time Zone America/Indiana/Indianapolis
Area Codes 765, 812, 930
Latitude 39,76° N
Longitude -87,23° 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 Rockville, IN

Postal Information

ZIP Code 56369
Type Po Box
Primary City Rockville
State MN
County Stearns County
Acceptable Cities -
Unacceptable -
Time Zone America/Chicago
Area Codes 320
Latitude 45,47° N
Longitude -94,34° 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 Rockville, MN

Postal Information

ZIP Code 64780
Type Standard
Primary City Rockville
State MO
County Bates County
Acceptable Cities -
Unacceptable Prairie City, Taberville
Time Zone America/Chicago
Area Codes 417, 660
Latitude 38,07° N
Longitude -94,08° 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 Rockville, MO

Postal Information

ZIP Code 68871
Type Standard
Primary City Rockville
State NE
County Sherman County
Acceptable Cities -
Unacceptable Bristol
Time Zone America/Chicago
Area Codes 308
Latitude 41,11° N
Longitude -98,83° 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 Rockville, NE

Postal Information

ZIP Code 84763
Type Po Box
Primary City Rockville
State UT
County Washington County
Acceptable Cities -
Unacceptable -
Time Zone America/Denver
Area Codes 435
Latitude 37,15° N
Longitude -113,05° 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 Rockville, UT

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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.