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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/20422

20422

ZIP 20422 is in Washington, District of Columbia; area codes 202 and 771; Eastern time. Washington has 271 ZIP codes in all.

Type
Standard
Time zone
America/New_York
Population
15
Coordinates
38.9271, -77.0103
☼ Live from 20422 — Washington, DC

Weather right now

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Local time: —

Where 20422 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 20422
  • 🔢 Type 20422 into a pocket calculator and turn it upside down: ZZhOZ — not quite a word, sorry.
  • ➕ As a number, 20,422 = 2 × 10211. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100111111000110
  • 🏠 Its numerical neighbours: 20421 (Washington, DC, 2 mi away) and 20423 (Washington, DC, 2 mi away).
  • 🔄 Backwards, 20422 becomes 22402 — and that is a real ZIP code: Fredericksburg, VA, 50 miles away.
  • 👥 14 other ZIP codes are made of exactly the same digits (04222, 20224, 20242, 22042, 22204, 22240, …). The farthest-flung twin is 42022 in Bandana, KY, 661 miles away.
  • 🧭 Farther south than 51% of all ZIP codes, and farther east than 82%.
  • 🎯1,151 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20422 and you would come out at 38.93°S, 102.99°E — 869 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
  • 📏 At 0.117 square miles of land, 20422 is bigger than 1% of ZIP codes — about 57 football fields.
🌙 The sky over 20422 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population15This ZIP15
Households0
Housing units0
Median age55.3This ZIP55.3District of Columbia34.9US 38.9
Bachelor's degree or higher20.0%This ZIP20.0%
Population density128.2 / sq miThis ZIP128.2 / sq mi

Business and tax activity

Business establishments8This ZIP8
Employees1,892This ZIP1,892
Annual payroll$115,036,000This ZIP$115,036,000

Land area

Land area0.12 sq miThis ZIP0.12 sq mi
Water area0.00 sq mi

Other place names in 20422

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

ZIP codes near 20422

ZIPCityDistance
20317 Washington, DC 0.6 mi
20059 Washington, DC 0.6 mi
20060 Washington, DC 0.8 mi
20064 Washington, DC 0.9 mi
20376 Washington Navy Yard, DC 1.1 mi
20017 Washington, DC 1.2 mi
20010 Washington, DC 1.2 mi
20001 Washington, DC 1.2 mi
20542 Washington, DC 1.4 mi
20417 Washington, DC 1.4 mi

Find every ZIP code within 10 miles of 20422 →

Questions about this ZIP code

Where is ZIP code 20422?

20422 is in Washington, District of Columbia, in District of Columbia, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 38.9271, -77.0103.

What county is 20422 in?

20422 lies in District of Columbia.

What area code is 20422?

Washington uses area codes 202 and 771, from NANPA's telephone records.

What time zone is 20422 in?

20422 uses America/New_York.

How many people live in 20422?

About 15 people live in ZIP code 20422, at 128.2 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What ZIP codes are near 20422?

The closest are 20317 (0.6 mi), 20059 (0.6 mi), 20060 (0.8 mi), 20064 (0.9 mi) and 20376 (1.1 mi).

Is 20422 a PO Box ZIP code?

20422 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “20422 ZIP Code — Washington, District of Columbia.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20422

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