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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 — ZIP/33051

33051

ZIP 33051 is Key Colony Beach, Florida, in Monroe County; Eastern time.

Type
Standard
Time zone
America/New_York
County
Monroe
Population
511
Coordinates
24.7234, -81.0216
☼ Live from 33051 — Key Colony Beach, FL

Weather right now

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NEXRAD radar
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Local time: —

Where 33051 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 33051
  • 🔢 Type 33051 into a pocket calculator and turn it upside down: ISOEE — not quite a word, sorry.
  • ➕ As a number, 33,051 = 3 × 23 × 479. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1000000100011011
  • 🏠 Its numerical neighbours: 33050 (Marathon, FL, 3 mi away) and 33052 (Marathon Shores, FL, 3 mi away).
  • 🔄 Backwards, 33051 becomes 15033 — and that is a real ZIP code: Donora, PA, 1,070 miles away.
  • 👥 30 other ZIP codes are made of exactly the same digits (10533, 13035, 13053, 13305, 13350, 13503, …). The farthest-flung twin is 51033 in Linn Grove, IA, 1,495 miles away.
  • 🧭 Farther south than 98% of all ZIP codes, and farther east than 70%.
  • 🎯1,458 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 33051 and you would come out at 24.72°S, 98.98°E — 880 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 40m of daylight. Shortest: 10h 36m.
  • 📏 At 0.439 square miles of land, 33051 is bigger than 5% of ZIP codes — about 212 football fields.
🌙 The sky over 33051 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population511This ZIP511
Households282This ZIP282
Housing units1,105This ZIP1,105
Median age66.5This ZIP66.5Florida42.6US 38.9
Median household income$94,231This ZIP$94,231Florida$74,568US $80,734
Median home value$919,800This ZIP$919,800Florida$359,000US $332,700
Median gross rent$1,929This ZIP$1,929Florida$1,669US $1,413
Bachelor's degree or higher43.8%This ZIP43.8%
Mean commute10.0 minThis ZIP10.0 min
Population density1,164.0 / sq miThis ZIP1,164.0 / sq mi

Business and tax activity

Business establishments39This ZIP39
Employees187This ZIP187
Annual payroll$7,181,000This ZIP$7,181,000

Land area

Land area0.44 sq miThis ZIP0.44 sq mi
Water area0.21 sq miThis ZIP0.21 sq mi

Other place names in 33051

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 33051

ZIPCityDistance
33052 Marathon Shores, FL 2.6 mi
33050 Marathon, FL 2.9 mi
33043 Big Pine Key, FL 15.5 mi
33001 Long Key, FL 15.8 mi
33036 Islamorada, FL 23.7 mi
33042 Summerland Key, FL 30.5 mi
33070 Tavernier, FL 36.7 mi
33041 Key West, FL 49.1 mi
33045 Key West, FL 49.1 mi
33037 Key Largo, FL 51.5 mi

Find every ZIP code within 10 miles of 33051 →

Questions about this ZIP code

Where is ZIP code 33051?

33051 is in Key Colony Beach, Florida, in Monroe County, part of the Key West-Key Largo, FL micropolitan area. Its published point location is 24.7234, -81.0216.

What county is 33051 in?

33051 lies in Monroe County.

What time zone is 33051 in?

33051 uses America/New_York.

How many people live in 33051?

About 511 people live in ZIP code 33051, in 282 households, at 1,164.0 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 33051?

$94,231 a year, against $74,568 across Florida.

What ZIP codes are near 33051?

The closest are 33052 (2.6 mi), 33050 (2.9 mi), 33043 (15.5 mi), 33001 (15.8 mi) and 33036 (23.7 mi).

Is 33051 a PO Box ZIP code?

33051 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “33051 ZIP Code — Key Colony Beach, Florida (Monroe County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/33051

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