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 — ZIP/11951

11951

ZIP 11951 is Mastic Beach, New York, in Suffolk County; area codes 631 and 934; Eastern time.

Type
Standard
Time zone
America/New_York
County
Suffolk
Population
15,938
Coordinates
40.7657, -72.8367
☼ Live from 11951 — Mastic Beach, NY

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 11951 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 11951
  • 🔢 Type 11951 into a pocket calculator and turn it upside down: ISGII — not quite a word, sorry.
  • ➕ As a number, 11,951 = 17 × 19 × 37. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10111010101111
  • 🏠 Its numerical neighbours: 11950 (Mastic, NY, 3 mi away) and 11952 (Mattituck, NY, 22 mi away).
  • 🔄 Backwards, 11951 becomes 15911, which is not a ZIP code at all.
  • 👥 6 other ZIP codes are made of exactly the same digits (19115, 19151, 19511, 59111, 91115, 95111). The farthest-flung twin is 95111 in San Jose, CA, 2,606 miles away.
  • 🧭 Farther north than 64% of all ZIP codes, and farther east than 93%.
  • 🎯1,353 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 11951 and you would come out at 40.77°S, 107.16°E — 777 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 06m of daylight. Shortest: 9h 15m.
  • 📏 At 4.8 square miles of land, 11951 is bigger than 18% of ZIP codes — room for about 3.6 Central Parks.
🌙 The sky over 11951 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population15,938This ZIP15,938
Households5,050This ZIP5,050
Housing units5,407This ZIP5,407
Median age35.6This ZIP35.6New York39.8US 38.9
Median household income$110,862This ZIP$110,862New York$85,974US $80,734
Median home value$355,400This ZIP$355,400New York$423,800US $332,700
Median gross rent$2,422This ZIP$2,422New York$1,621US $1,413
Bachelor's degree or higher24.0%This ZIP24.0%
Mean commute37.0 minThis ZIP37.0 min
Population density3,321.1 / sq miThis ZIP3,321.1 / sq mi

Business and tax activity

Business establishments155This ZIP155
Employees568This ZIP568
Annual payroll$20,508,000This ZIP$20,508,000
Tax returns filed6,800This ZIP6,800
Total adjusted gross income$398,237,000This ZIP$398,237,000

Land area

Land area4.80 sq miThis ZIP4.80 sq mi
Water area1.09 sq miThis ZIP1.09 sq mi

Other place names in 11951

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

ZIP codes near 11951

ZIPCityDistance
11950 Mastic, NY 2.8 mi
11967 Shirley, NY 3.3 mi
11934 Center Moriches, NY 3.3 mi
11955 Moriches, NY 3.4 mi
11719 Brookhaven, NY 3.8 mi
11940 East Moriches, NY 5.1 mi
11713 Bellport, NY 5.6 mi
11980 Yaphank, NY 6.5 mi
11949 Manorville, NY 7.2 mi
11941 Eastport, NY 7.4 mi

Find every ZIP code within 10 miles of 11951 →

Questions about this ZIP code

Where is ZIP code 11951?

11951 is in Mastic Beach, New York, in Suffolk County, part of the New York-Newark-Jersey City, NY-NJ metropolitan area. Its published point location is 40.7657, -72.8367.

What county is 11951 in?

11951 lies in Suffolk County.

What area code is 11951?

Mastic Beach uses area codes 631 and 934, from NANPA's telephone records.

What time zone is 11951 in?

11951 uses America/New_York.

How many people live in 11951?

About 15,938 people live in ZIP code 11951, in 5,050 households, at 3,321.1 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 11951?

$110,862 a year, against $85,974 across New York.

What ZIP codes are near 11951?

The closest are 11950 (2.8 mi), 11967 (3.3 mi), 11934 (3.3 mi), 11955 (3.4 mi) and 11719 (3.8 mi).

Is 11951 a PO Box ZIP code?

11951 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “11951 ZIP Code — Mastic Beach, New York (Suffolk County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/11951

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/11951.json

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