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/NY/NORTHWEST-HARBOR

Northwest Harbor ZIP codes, New York

No ZIP code is named for Northwest Harbor, NY; addresses there use a neighbouring town's name. 2 ZIP codes cover it: 11937 and 11963. Its area codes are 631 and 934.

USPS city name
0 ZIP codes
Overlapping the city
2 more
Population
5,205
Area codes
631, 934

NANPA lists no telephone rate centre for Northwest Harbor itself, so these are the area codes of the nearest one, East Hampton (0.0 miles). A town on an area-code boundary can differ from its neighbour.

Northwest Harbor in numbers

About 5,205 people live in Northwest Harbor, in 2,149 households. The median household income is $160,375 a year, 87% above the New York median of $85,974 (US: $80,734). The median owner-occupied home is valued at $1,573,300 (3.7 times the New York median), and median gross rent is $1,807 a month. The median age is 47.9; 61.4% of adults 25 and over hold a bachelor's degree or higher (40.2% across New York); the average commute takes 23 minutes.

Population5,205Northwest Harbor5,205
Households2,149Northwest Harbor2,149
Median age47.9Northwest Harbor47.9New York39.8US 38.9
Median household income$160,375Northwest Harbor$160,375New York$85,974US $80,734
Median home value$1,573,300Northwest Harbor$1,573,300New York$423,800US $332,700
Median gross rent$1,807Northwest Harbor$1,807New York$1,621US $1,413
Bachelor's degree or higher61.4%Northwest Harbor61.4%New York40.2%US 35.7%
Mean commute23.3 minNorthwest Harbor23.3 minNew York32.6 minUS 26.4 min
Population density360 / sq miNorthwest Harbor360 / sq mi

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

ZIP codes covering Northwest Harbor

These ZIP codes cover part of Northwest Harbor but are addressed as somewhere else.

ZIP codes overlapping Northwest Harbor
ZIP City Type Population Median income Median home
11937 East Hampton , NY Standard 21,882 $129,883 $1,115,100
11963 Sag Harbor , NY Standard 8,390 $127,746 $1,208,000

Map of Northwest Harbor ZIP codes

1193711963

The ZIP codes of Northwest Harbor, NY, 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 Northwest Harbor

The nearest larger towns are East Hampton North (6,006 people, 3.3 mi), Springs (9,163 people, 3.4 mi) and North Sea (6,458 people, 11 mi).

Towns near Northwest Harbor
TownPopulationDistance
East Hampton North 6,006 3.3 mi
Springs 9,163 3.4 mi
Noyack 4,782 7.0 mi
Water Mill 2,764 9.3 mi
Greenport 2,574 9.8 mi
North Sea 6,458 11.2 mi
Southold 6,397 11.5 mi
Southampton 4,621 13.4 mi
Cutchogue 2,835 13.9 mi
Montauk 4,223 14.5 mi
Shinnecock Hills 2,545 14.9 mi
Mattituck 4,606 16.9 mi
Hampton Bays 15,706 18.6 mi
Niantic, CT 3,123 21.0 mi

More nearby: every ZIP code in Suffolk County · New York ZIP codes

Cite this page

zipcodes.pro. “Northwest Harbor, NY ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ny/northwest-harbor

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