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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 Rockville

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

Postal Information

ZIP Code 02873
Type Po Box
Primary City Rockville
State RI
County Washington County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 401, 860, 959
Latitude 41,53° N
Longitude -71,78° 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, RI

Postal Information

ZIP Code 06066
Type Standard
Primary City Vernon Rockville
State CT
County Tolland County
Acceptable Cities Vernon, Vernon Rockvl
Unacceptable Rockville, Talcottville, Turnpike
Time Zone America/New_York
Area Codes 860, 959
Latitude 41,84° N
Longitude -72,45° 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 Vernon Rockville, CT

Postal Information

ZIP Code 11570
Type Standard
Primary City Rockville Centre
State NY
County Nassau County
Acceptable Cities Rockville Ctr
Unacceptable Lakeview, Rockville Center, Rvc
Time Zone America/New_York
Area Codes 363, 516
Latitude 40,66° N
Longitude -73,63° 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 Centre, NY

Postal Information

ZIP Code 11571
Type Po Box
Primary City Rockville Centre
State NY
County Nassau County
Acceptable Cities Rockville Ctr
Unacceptable Rockville Center, Rvc
Time Zone America/New_York
Area Codes 516
Latitude 40,66° N
Longitude -73,63° 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 Centre, NY

Postal Information

ZIP Code 11592
Type Unique
Primary City Rockville Center
State NY
County Nassau County
Acceptable Cities Rvc, National Profit, Rockville Ctr, Rockville Centre
Unacceptable -
Time Zone America/New_York
Area Codes 516
Latitude 40,75° N
Longitude -73,57° 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 Rockville Center, NY

Postal Information

ZIP Code 20847
Type Po Box
Primary City Rockville
State MD
County Montgomery County
Acceptable Cities -
Unacceptable -
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 20848
Type Po Box
Primary City Rockville
State MD
County Montgomery County
Acceptable Cities -
Unacceptable -
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 20849
Type Po Box
Primary City Rockville
State MD
County Montgomery County
Acceptable Cities -
Unacceptable -
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 20850
Type Standard
Primary City Rockville
State MD
County Montgomery County
Acceptable Cities Potomac
Unacceptable -
Time Zone America/New_York
Area Codes 227, 240, 301
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 20851
Type Standard
Primary City Rockville
State MD
County Montgomery County
Acceptable Cities -
Unacceptable -
Time Zone America/New_York
Area Codes 227, 240, 301
Latitude 39,08° 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

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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.