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/18091

18091

ZIP 18091 is Wind Gap, Pennsylvania, in Northampton County; Eastern time.

Type
Standard
Time zone
America/New_York
County
Northampton
Population
6,547
Coordinates
40.8248, -75.3257
☼ Live from 18091 — Wind Gap, PA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 18091 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 18091
  • 🔢 Type 18091 into a pocket calculator and turn it upside down: IGOBI — not quite a word, sorry.
  • ➕ As a number, 18,091 = 79 × 229. Its digits add up to 19, a total 2,454 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100011010101011
  • 🏠 Its numerical neighbours: 18088 (Walnutport, PA, 13 mi away) and 18092 (Zionsville, PA, 26 mi away).
  • 🔄 Backwards, 18091 becomes 19081 — and that is a real ZIP code: Swarthmore, PA, 64 miles away.
  • 👥 23 other ZIP codes are made of exactly the same digits (09811, 10918, 10981, 11980, 18109, 18901, …). The farthest-flung twin is 09811 in APO AE, a military post office, 6,425 miles away.
  • 🧭 Farther north than 65% of all ZIP codes, and farther east than 87%.
  • 🎯1,223 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 18091 and you would come out at 40.82°S, 104.67°E — 872 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 06m of daylight. Shortest: 9h 14m.
  • 📏 At 14.8 square miles of land, 18091 is bigger than 33% of ZIP codes — room for about 11 Central Parks.
🌙 The sky over 18091 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population6,547This ZIP6,547
Households2,673This ZIP2,673
Housing units2,725This ZIP2,725
Median age45.9This ZIP45.9Pennsylvania40.9US 38.9
Median household income$80,464This ZIP$80,464Pennsylvania$77,971US $80,734
Median home value$277,600This ZIP$277,600Pennsylvania$254,500US $332,700
Median gross rent$1,354This ZIP$1,354Pennsylvania$1,209US $1,413
Bachelor's degree or higher29.1%This ZIP29.1%
Mean commute25.5 minThis ZIP25.5 min
Population density441.2 / sq miThis ZIP441.2 / sq mi

Business and tax activity

Business establishments178This ZIP178
Employees1,513This ZIP1,513
Annual payroll$63,107,000This ZIP$63,107,000
Tax returns filed3,180This ZIP3,180
Total adjusted gross income$244,508,000This ZIP$244,508,000

Land area

Land area14.84 sq miThis ZIP14.84 sq mi
Water area0.24 sq miThis ZIP0.24 sq mi

Other place names in 18091

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

ZIP codes near 18091

ZIPCityDistance
18072 Pen Argyl, PA 3.7 mi
18064 Nazareth, PA 4.7 mi
18353 Saylorsburg, PA 5.2 mi
18083 Stockertown, PA 5.8 mi
18014 Bath, PA 6.1 mi
18354 Sciota, PA 6.8 mi
18085 Tatamy, PA 6.9 mi
18322 Brodheadsville, PA 7.4 mi
18040 Easton, PA 7.6 mi
18063 Martins Creek, PA 8.1 mi

Find every ZIP code within 10 miles of 18091 →

Questions about this ZIP code

Where is ZIP code 18091?

18091 is in Wind Gap, Pennsylvania, in Northampton County, part of the Allentown-Bethlehem-Easton, PA-NJ metropolitan area. Its published point location is 40.8248, -75.3257.

What county is 18091 in?

18091 lies in Northampton County.

What time zone is 18091 in?

18091 uses America/New_York.

How many people live in 18091?

About 6,547 people live in ZIP code 18091, in 2,673 households, at 441.2 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 18091?

$80,464 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 18091?

The closest are 18072 (3.7 mi), 18064 (4.7 mi), 18353 (5.2 mi), 18083 (5.8 mi) and 18014 (6.1 mi).

Is 18091 a PO Box ZIP code?

18091 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “18091 ZIP Code — Wind Gap, Pennsylvania (Northampton County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/18091

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/18091.json

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