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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/18102

18102

ZIP 18102 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
51,001
Coordinates
40.6079, -75.4762
☼ Live from 18102 — Allentown, PA

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Where 18102 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 18102
  • 🔢 Type 18102 into a pocket calculator and turn it upside down: ZOIBI — not quite a word, sorry.
  • ➕ As a number, 18,102 = 2 × 3 × 7 × 431. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100011010110110
  • 🏠 Its numerical neighbours: 18101 (Allentown, PA, 0 mi away) and 18103 (Allentown, PA, 3 mi away).
  • 🔄 Backwards, 18102 becomes 20181 — and that is a real ZIP code: Nokesville, VA, 174 miles away.
  • 👥 34 other ZIP codes are made of exactly the same digits (01128, 01812, 01821, 02118, 10128, 10281, …). The farthest-flung twin is 81120 in Antonito, CO, 1,668 miles away.
  • 🧭 Farther north than 62% of all ZIP codes, and farther east than 86%.
  • 🎯1,217 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 18102 and you would come out at 40.61°S, 104.52°E — 868 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 05m of daylight. Shortest: 9h 16m.
  • 📏 At 3.0 square miles of land, 18102 is bigger than 14% of ZIP codes — room for about 2.3 Central Parks.
🌙 The sky over 18102 today
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🌋 Shake report
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Source: USGS.

People and housing

Population51,001This ZIP51,001
Households17,289This ZIP17,289
Housing units18,849This ZIP18,849
Median age31.9This ZIP31.9Pennsylvania40.9US 38.9
Median household income$43,085This ZIP$43,085Pennsylvania$77,971US $80,734
Median home value$163,400This ZIP$163,400Pennsylvania$254,500US $332,700
Median gross rent$1,248This ZIP$1,248Pennsylvania$1,209US $1,413
Bachelor's degree or higher11.6%This ZIP11.6%
Mean commute24.9 minThis ZIP24.9 min
Population density17,103.0 / sq miThis ZIP17,103.0 / sq mi

Business and tax activity

Business establishments588This ZIP588
Employees6,588This ZIP6,588
Annual payroll$321,936,000This ZIP$321,936,000
Tax returns filed23,410This ZIP23,410
Total adjusted gross income$790,407,000This ZIP$790,407,000

Land area

Land area2.98 sq miThis ZIP2.98 sq mi
Water area0.11 sq miThis ZIP0.11 sq mi

Other place names in 18102

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

ZIP codes near 18102

ZIPCityDistance
18101 Allentown, PA 0.5 mi
18105 Allentown, PA 0.7 mi
18109 Allentown, PA 2.6 mi
18103 Allentown, PA 2.7 mi
18032 Catasauqua, PA 3.4 mi
18104 Allentown, PA 3.7 mi
18052 Whitehall, PA 3.7 mi
18018 Bethlehem, PA 4.4 mi
18002 Lehigh Valley, PA 4.8 mi
18098 Emmaus, PA 4.9 mi

Find every ZIP code within 10 miles of 18102 →

Questions about this ZIP code

Where is ZIP code 18102?

18102 is in Allentown, Pennsylvania, in Lehigh County, part of the Allentown-Bethlehem-Easton, PA-NJ metropolitan area. Its published point location is 40.6079, -75.4762.

What county is 18102 in?

18102 lies in Lehigh County.

What area code is 18102?

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

What time zone is 18102 in?

18102 uses America/New_York.

How many people live in 18102?

About 51,001 people live in ZIP code 18102, in 17,289 households, at 17,103.0 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 18102?

$43,085 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 18102?

The closest are 18101 (0.5 mi), 18105 (0.7 mi), 18109 (2.6 mi), 18103 (2.7 mi) and 18032 (3.4 mi).

Is 18102 a PO Box ZIP code?

18102 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “18102 ZIP Code — Allentown, Pennsylvania (Lehigh County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/18102

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