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zipcodes.pro — ZIP/11731

11731

ZIP 11731 is East Northport, New York, in Suffolk County; area codes 631 and 934; Eastern time.

Type
Standard
Time zone
America/New_York
County
Suffolk
Population
29,999
Coordinates
40.8626, -73.3170
☼ Live from 11731 — East Northport, NY

Weather right now

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NEXRAD radar
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Local time: —

Where 11731 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 11731
  • 🔢 Type 11731 into a pocket calculator and turn it upside down: IELII — not quite a word, sorry.
  • ➕ 11731 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10110111010011
  • 🏠 Its numerical neighbours: 11730 (East Islip, NY, 12 mi away) and 11732 (East Norwich, NY, 12 mi away).
  • 🔄 Backwards, 11731 becomes 13711, which is not a ZIP code at all.
  • 👥 9 other ZIP codes are made of exactly the same digits (11371, 11713, 13117, 17113, 17311, 31711, …). The farthest-flung twin is 73111 in Oklahoma City, OK, 1,358 miles away.
  • 🧭 Farther north than 65% of all ZIP codes, and farther east than 92%.
  • 🎯1,328 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 11731 and you would come out at 40.86°S, 106.68°E — 799 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 07m of daylight. Shortest: 9h 14m.
  • 📏 At 8.3 square miles of land, 11731 is bigger than 25% of ZIP codes — room for about 6.3 Central Parks.
🌙 The sky over 11731 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population29,999This ZIP29,999
Households10,811This ZIP10,811
Housing units11,125This ZIP11,125
Median age46.2This ZIP46.2New York39.8US 38.9
Median household income$161,132This ZIP$161,132New York$85,974US $80,734
Median home value$646,600This ZIP$646,600New York$423,800US $332,700
Median gross rent$2,412This ZIP$2,412New York$1,621US $1,413
Bachelor's degree or higher53.2%This ZIP53.2%
Mean commute35.9 minThis ZIP35.9 min
Population density3,605.2 / sq miThis ZIP3,605.2 / sq mi

Business and tax activity

Business establishments871This ZIP871
Employees6,541This ZIP6,541
Annual payroll$257,082,000This ZIP$257,082,000
Tax returns filed16,040This ZIP16,040
Total adjusted gross income$1,887,731,000This ZIP$1,887,731,000

Land area

Land area8.32 sq miThis ZIP8.32 sq mi
Water area0.00 sq mi

Other place names in 11731

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

ZIP codes near 11731

ZIPCityDistance
11740 Greenlawn, NY 2.3 mi
11725 Commack, NY 2.4 mi
11754 Kings Park, NY 3.8 mi
11721 Centerport, NY 4.0 mi
11746 Huntington Station, NY 4.1 mi
11768 Northport, NY 4.4 mi
11787 Smithtown, NY 5.6 mi
11743 Huntington, NY 5.7 mi
11788 Hauppauge, NY 6.2 mi
11717 Brentwood, NY 6.4 mi

Find every ZIP code within 10 miles of 11731 →

Questions about this ZIP code

Where is ZIP code 11731?

11731 is in East Northport, New York, in Suffolk County, part of the New York-Newark-Jersey City, NY-NJ metropolitan area. Its published point location is 40.8626, -73.3170.

What county is 11731 in?

11731 lies in Suffolk County.

What area code is 11731?

East Northport uses area codes 631 and 934, from NANPA's telephone records.

What time zone is 11731 in?

11731 uses America/New_York.

How many people live in 11731?

About 29,999 people live in ZIP code 11731, in 10,811 households, at 3,605.2 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 11731?

$161,132 a year, against $85,974 across New York.

What ZIP codes are near 11731?

The closest are 11740 (2.3 mi), 11725 (2.4 mi), 11754 (3.8 mi), 11721 (4 mi) and 11746 (4.1 mi).

Is 11731 a PO Box ZIP code?

11731 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “11731 ZIP Code — East Northport, New York (Suffolk County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/11731

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