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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/16634

16634

ZIP 16634 is Dudley, Pennsylvania, in Huntingdon County; area code 814; Eastern time.

Type
Standard
Time zone
America/New_York
County
Huntingdon
Metro area
Huntingdon, PA
Population
262
Coordinates
40.2105, -78.1731
☼ Live from 16634 — Dudley, PA

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Where 16634 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 16634
  • 🔢 Type 16634 into a pocket calculator and turn it upside down: hEggI — not quite a word, sorry.
  • ➕ As a number, 16,634 = 2 × 8317. Its digits add up to 20, a total 2,586 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100000011111010
  • 🏠 Its numerical neighbours: 16633 (Defiance, PA, 5 mi away) and 16635 (Duncansville, PA, 21 mi away).
  • 🔄 Backwards, 16634 becomes 43661 — and that is a real ZIP code: Toledo, OH, 296 miles away.
  • 👥 29 other ZIP codes are made of exactly the same digits (13646, 13664, 16346, 16364, 16436, 34661, …). The farthest-flung twin is 66431 in Harveyville, KS, 954 miles away.
  • 🧭 Farther north than 58% of all ZIP codes, and farther east than 78%.
  • 🎯1,078 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 16634 and you would come out at 40.21°S, 101.83°E — 967 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 02m of daylight. Shortest: 9h 18m.
  • 📏 At 3.3 square miles of land, 16634 is bigger than 15% of ZIP codes — room for about 2.5 Central Parks.
🌙 The sky over 16634 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population262This ZIP262
Households123This ZIP123
Housing units155This ZIP155
Median age51.7This ZIP51.7Pennsylvania40.9US 38.9
Median household income$58,750This ZIP$58,750Pennsylvania$77,971US $80,734
Median home value$89,700This ZIP$89,700Pennsylvania$254,500US $332,700
Median gross rent$1,167This ZIP$1,167Pennsylvania$1,209US $1,413
Bachelor's degree or higher10.9%This ZIP10.9%
Mean commute41.6 minThis ZIP41.6 min
Population density79.7 / sq miThis ZIP79.7 / sq mi

Business and tax activity

Business establishments6This ZIP6
Employees14This ZIP14
Annual payroll$262,000This ZIP$262,000

Land area

Land area3.29 sq miThis ZIP3.29 sq mi
Water area0.00 sq mi

Other place names in 16634

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

ZIP codes near 16634

ZIPCityDistance
16694 Wood, PA 2.5 mi
16678 Saxton, PA 3.3 mi
16672 Riddlesburg, PA 3.7 mi
16679 Six Mile Run, PA 4.0 mi
16633 Defiance, PA 4.7 mi
16621 Broad Top, PA 4.7 mi
16674 Robertsdale, PA 5.2 mi
16685 Todd, PA 6.8 mi
16623 Cassville, PA 8.1 mi
16695 Woodbury, PA 8.7 mi

Find every ZIP code within 10 miles of 16634 →

Questions about this ZIP code

Where is ZIP code 16634?

16634 is in Dudley, Pennsylvania, in Huntingdon County, part of the Huntingdon, PA micropolitan area. Its published point location is 40.2105, -78.1731.

What county is 16634 in?

16634 lies in Huntingdon County.

What area code is 16634?

Dudley uses area code 814, from NANPA's telephone records.

What time zone is 16634 in?

16634 uses America/New_York.

How many people live in 16634?

About 262 people live in ZIP code 16634, in 123 households, at 79.7 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 16634?

$58,750 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 16634?

The closest are 16694 (2.5 mi), 16678 (3.3 mi), 16672 (3.7 mi), 16679 (4 mi) and 16633 (4.7 mi).

Is 16634 a PO Box ZIP code?

16634 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “16634 ZIP Code — Dudley, Pennsylvania (Huntingdon County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/16634

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