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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/16420

16420

ZIP 16420 is Grand Valley, Pennsylvania, in Warren County; area code 814; Eastern time.

Type
Standard
Time zone
America/New_York
County
Warren
Metro area
Warren, PA
Population
515
Coordinates
41.6948, -79.5455
☼ Live from 16420 — Grand Valley, PA

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Local time: —

Where 16420 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 16420
  • 🔢 Type 16420 into a pocket calculator and turn it upside down: OZhgI — not quite a word, sorry.
  • ➕ As a number, 16,420 = 2 × 2 × 5 × 821. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100000000100100
  • 🏠 Its numerical neighbours: 16417 (Girard, PA, 44 mi away) and 16421 (Harborcreek, PA, 39 mi away).
  • 🔄 Backwards, 16420 becomes 02461 — and that is a real ZIP code: Newton Highlands, MA, 430 miles away.
  • 👥 66 other ZIP codes are made of exactly the same digits (01264, 01462, 02461, 02641, 04216, 04261, …). The farthest-flung twin is 64012 in Belton, MO, 815 miles away.
  • 🧭 Farther north than 73% of all ZIP codes, and farther east than 75%.
  • 🎯1,002 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 16420 and you would come out at 41.69°S, 100.45°E — 1,083 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 12m of daylight. Shortest: 9h 09m.
  • 📏 At 49.5 square miles of land, 16420 is bigger than 59% of ZIP codes — room for about 38 Central Parks.
🌙 The sky over 16420 today
  • Working out the sun…
🌋 Shake report
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Source: USGS.

People and housing

Population515This ZIP515
Households206This ZIP206
Housing units404This ZIP404
Median age54.0This ZIP54.0Pennsylvania40.9US 38.9
Median household income$53,750This ZIP$53,750Pennsylvania$77,971US $80,734
Median home value$81,700This ZIP$81,700Pennsylvania$254,500US $332,700
Median gross rent$975This ZIP$975Pennsylvania$1,209US $1,413
Bachelor's degree or higher7.2%This ZIP7.2%
Mean commute30.9 minThis ZIP30.9 min
Population density10.4 / sq miThis ZIP10.4 / sq mi

Business and tax activity

Tax returns filed280This ZIP280
Total adjusted gross income$13,180,000This ZIP$13,180,000

Land area

Land area49.54 sq miThis ZIP49.54 sq mi
Water area0.00 sq mi

ZIP codes near 16420

ZIPCityDistance
16341 Pleasantville, PA 9.1 mi
16351 Tidioute, PA 9.1 mi
16434 Spartansburg, PA 9.5 mi
16340 Pittsfield, PA 9.7 mi
16416 Garland, PA 9.8 mi
16328 Hydetown, PA 9.9 mi
16354 Titusville, PA 10.0 mi
16322 Endeavor, PA 10.4 mi
16370 West Hickory, PA 10.7 mi
16321 East Hickory, PA 11.5 mi

Find every ZIP code within 10 miles of 16420 →

Questions about this ZIP code

Where is ZIP code 16420?

16420 is in Grand Valley, Pennsylvania, in Warren County, part of the Warren, PA micropolitan area. Its published point location is 41.6948, -79.5455.

What county is 16420 in?

16420 lies in Warren County.

What area code is 16420?

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

What time zone is 16420 in?

16420 uses America/New_York.

How many people live in 16420?

About 515 people live in ZIP code 16420, in 206 households, at 10.4 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 16420?

$53,750 a year, against $77,971 across Pennsylvania.

What ZIP codes are near 16420?

The closest are 16341 (9.1 mi), 16351 (9.1 mi), 16434 (9.5 mi), 16340 (9.7 mi) and 16416 (9.8 mi).

Is 16420 a PO Box ZIP code?

16420 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “16420 ZIP Code — Grand Valley, Pennsylvania (Warren County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/16420

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