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U.S. ZIP Codes Database 2026

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ZIP Code Details for Summerland Key

Detailed geographic and postal record lookup for the city of Summerland Key.

Postal Information

ZIP Code 33042
Type Standard
Primary City Summerland Key
State FL
County Monroe County
Acceptable Cities Big Torch Key, Cudjoe Key, Little Torch Key, Lower Sugarloaf Key, Ltl Torch Key, Lwr Sugarloaf, Mid Torch Key, Middle Torch Key, Ramrod Key, Sugarlf Shrs, Sugarloaf, Sugarloaf Key, Sugarloaf Shrs, Summrlnd Key, Upper Sugarloaf Key, Upr Sugarloaf
Unacceptable -
Time Zone America/New_York
Area Codes 305, 786
Latitude 24,66° N
Longitude -81,45° 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 Summerland Key, FL

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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.