Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/FL/KEY-LARGO

Key Largo ZIP code, Florida

The ZIP code for Key Largo, FL is 33037, and its area codes are 786, 305 and 645.

USPS city name
1 ZIP code
Overlapping the city
1 more
Population
13,026
Area codes
786, 305, 645
State
Florida

NANPA lists no telephone rate centre for Key Largo itself, so these are the area codes of the nearest one, Homestead (13.6 miles). A town on an area-code boundary can differ from its neighbour.

Mail addressed to Key Largo uses the ZIP code above. 1 more ZIP code covers part of the city but is addressed as somewhere else; they are listed separately below.

Key Largo in numbers

About 13,026 people live in Key Largo, in 5,263 households. The median household income is $85,778 a year, 15% above the Florida median of $74,568 (US: $80,734). The median owner-occupied home is valued at $643,900 (79% above the Florida median), and median gross rent is $1,887 a month. The median age is 49.6; 39.0% of adults 25 and over hold a bachelor's degree or higher (34.1% across Florida); the average commute takes 26 minutes.

Population13,026Key Largo13,026
Households5,263Key Largo5,263
Median age49.6Key Largo49.6Florida42.6US 38.9
Median household income$85,778Key Largo$85,778Florida$74,568US $80,734
Median home value$643,900Key Largo$643,900Florida$359,000US $332,700
Median gross rent$1,887Key Largo$1,887Florida$1,669US $1,413
Bachelor's degree or higher39.0%Key Largo39.0%Florida34.1%US 35.7%
Mean commute26.4 minKey Largo26.4 minFlorida28.0 minUS 26.4 min
Population density1,081 / sq miKey Largo1,081 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Key Largo CDP. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Key Largo

ZIP codes with the USPS city name Key Largo
ZIP City Type Population Median income Median home
33037 Key Largo , FL Standard 14,770 $86,533 $683,000

Other ZIP codes overlapping Key Largo

These ZIP codes cover part of Key Largo but are addressed as somewhere else.

ZIP codes overlapping Key Largo
ZIP City Type Population Median income Median home
33070 Tavernier , FL Standard 5,768 $75,436 $732,800

Map of Key Largo ZIP codes

33037

The ZIP codes of Key Largo, FL, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Key Largo

The nearest larger towns are Homestead (82,807 people, 24 mi), Leisure City (27,808 people, 26 mi) and Naranja (15,796 people, 27 mi).

Towns near Key Largo
TownPopulationDistance
Islamorada, Village of Islands 7,068 12.6 mi
Florida City 12,943 22.5 mi
Homestead 82,807 23.9 mi
Leisure City 27,808 25.7 mi
Naranja 15,796 27.2 mi
Princeton 42,625 28.9 mi

More nearby: every ZIP code in Monroe County · Florida ZIP codes

Cite this page

zipcodes.pro. “Key Largo, FL ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/fl/key-largo

Underlying data is public domain or openly licensed — sources, vintages and licences.