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U.S. ZIP Codes Database 2026

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ZIP Code Details for Baytown

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

Postal Information

ZIP Code 77520
Type Standard
Primary City Baytown
State TX
County Harris County
Acceptable Cities Beach City, Cove, Mont Belvieu, Old River Winfree, Old Rvr Wnfre
Unacceptable Bayway, Cedar Point, Garth, Lakewood, Lynchburg, Mcnair, Stewart Heights
Time Zone America/Chicago
Area Codes 281, 346, 713, 832
Latitude 29,74° N
Longitude -94,96° 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 Baytown, TX

Postal Information

ZIP Code 77521
Type Standard
Primary City Baytown
State TX
County Harris County
Acceptable Cities Mont Belvieu
Unacceptable -
Time Zone America/Chicago
Area Codes 281, 346, 713, 832, 936
Latitude 29,8° N
Longitude -94,97° 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 Baytown, TX

Postal Information

ZIP Code 77522
Type Po Box
Primary City Baytown
State TX
County Harris County
Acceptable Cities -
Unacceptable -
Time Zone America/Chicago
Area Codes 713
Latitude 29,74° N
Longitude -94,96° 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 Baytown, TX

Postal Information

ZIP Code 77523
Type Standard
Primary City Baytown
State TX
County Chambers County
Acceptable Cities Beach City, Cove, Mont Belvieu, Old River Winfree, Old Rvr Wnfre
Unacceptable -
Time Zone America/Chicago
Area Codes 281, 346, 713, 832, 936
Latitude 29,76° N
Longitude -94,87° 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 Baytown, TX

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.