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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/18106

18106

ZIP 18106 is in Allentown, Pennsylvania, in Lehigh County; area codes 484, 610 and 835; Eastern time. Allentown has 8 ZIP codes in all.

Type
Standard
Time zone
America/New_York
County
Lehigh
Population
6,226
Coordinates
40.5637, -75.5652
☼ Live from 18106 — Allentown, PA

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Where 18106 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 18106
  • 🔢 Type 18106 into a pocket calculator and turn it upside down: gOIBI — not quite a word, sorry.
  • ➕ As a number, 18,106 = 2 × 11 × 823. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100011010111010
  • 🏠 Its numerical neighbours: 18105 (Allentown, PA, 5 mi away) and 18109 (Allentown, PA, 8 mi away).
  • 🔄 Backwards, 18106 becomes 60181 — and that is a real ZIP code: Villa Park, IL, 651 miles away.
  • 👥 25 other ZIP codes are made of exactly the same digits (06118, 06811, 08611, 10168, 16018, 16108, …). The farthest-flung twin is 86011 in Flagstaff, AZ, 1,989 miles away.
  • 🧭 Farther north than 61% of all ZIP codes, and farther east than 86%.
  • 🎯1,212 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 18106 and you would come out at 40.56°S, 104.43°E — 870 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 05m of daylight. Shortest: 9h 16m.
  • 📏 At 8.0 square miles of land, 18106 is bigger than 24% of ZIP codes — room for about 6.0 Central Parks.
🌙 The sky over 18106 today
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🌋 Shake report
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Source: USGS.

People and housing

Population6,226This ZIP6,226
Households2,513This ZIP2,513
Housing units2,594This ZIP2,594
Median age46.5This ZIP46.5Pennsylvania40.9US 38.9
Median household income$92,813This ZIP$92,813Pennsylvania$77,971US $80,734
Median home value$412,200This ZIP$412,200Pennsylvania$254,500US $332,700
Median gross rent$1,419This ZIP$1,419Pennsylvania$1,209US $1,413
Bachelor's degree or higher49.4%This ZIP49.4%
Mean commute22.1 minThis ZIP22.1 min
Population density782.1 / sq miThis ZIP782.1 / sq mi

Business and tax activity

Business establishments631This ZIP631
Employees21,303This ZIP21,303
Annual payroll$1,632,805,000This ZIP$1,632,805,000
Tax returns filed3,690This ZIP3,690
Total adjusted gross income$377,309,000This ZIP$377,309,000

Land area

Land area7.96 sq miThis ZIP7.96 sq mi
Water area0.11 sq miThis ZIP0.11 sq mi

Other place names in 18106

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

ZIP codes near 18106

ZIPCityDistance
18046 East Texas, PA 1.1 mi
18087 Trexlertown, PA 1.6 mi
18195 Allentown, PA 3.4 mi
18104 Allentown, PA 3.4 mi
18098 Emmaus, PA 4.0 mi
18099 Emmaus, PA 4.0 mi
18103 Allentown, PA 4.0 mi
18062 Macungie, PA 4.1 mi
18031 Breinigsville, PA 4.4 mi
18049 Emmaus, PA 4.9 mi

Find every ZIP code within 10 miles of 18106 →

Questions about this ZIP code

Where is ZIP code 18106?

18106 is in Allentown, Pennsylvania, in Lehigh County, part of the Allentown-Bethlehem-Easton, PA-NJ metropolitan area. Its published point location is 40.5637, -75.5652.

What county is 18106 in?

18106 lies in Lehigh County.

What area code is 18106?

Allentown uses area codes 484, 610 and 835, from NANPA's telephone records.

What time zone is 18106 in?

18106 uses America/New_York.

How many people live in 18106?

About 6,226 people live in ZIP code 18106, in 2,513 households, at 782.1 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 18106?

$92,813 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 18106?

The closest are 18046 (1.1 mi), 18087 (1.6 mi), 18195 (3.4 mi), 18104 (3.4 mi) and 18098 (4 mi).

Is 18106 a PO Box ZIP code?

18106 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “18106 ZIP Code — Allentown, Pennsylvania (Lehigh County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/18106

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