Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/20001

20001

ZIP 20001 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
44,616
Coordinates
38.9104, -77.0177
☼ Live from 20001 — Washington, DC

Weather right now

Asking the National Weather Service…

NEXRAD radar
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Local time: —

Where 20001 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 20001
  • 🔢 Type 20001 into a pocket calculator and turn it upside down: IOOOZ — not quite a word, sorry.
  • ➕ As a number, 20,001 = 3 × 59 × 113. Its digits add up to 3, a total 12 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100111000100001
  • 🏠 Its numerical neighbours: 19980 (Woodside, DE, 79 mi away) and 20002 (Washington, DC, 2 mi away).
  • 🔄 Backwards, 20001 becomes 10002 — and that is a real ZIP code: New York, NY, 204 miles away.
  • 👥 5 other ZIP codes are made of exactly the same digits (01002, 01020, 10002, 10020, 20010). The farthest-flung twin is 01002 in Amherst, MA, 338 miles away.
  • 🧭 Farther south than 51% of all ZIP codes, and farther east than 81%.
  • 🎯1,151 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20001 and you would come out at 38.91°S, 102.98°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 2.0 square miles of land, 20001 is bigger than 12% of ZIP codes — room for about 1.6 Central Parks.
🌙 The sky over 20001 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population44,616This ZIP44,616
Households23,868This ZIP23,868
Housing units26,928This ZIP26,928
Median age32.6This ZIP32.6District of Columbia34.9US 38.9
Median household income$138,059This ZIP$138,059District of Columbia$109,870US $80,734
Median home value$852,600This ZIP$852,600District of Columbia$737,100US $332,700
Median gross rentunder $2,500This ZIPunder $2,500District of Columbia$1,954US $1,413
Bachelor's degree or higher77.5%This ZIP77.5%
Mean commute27.4 minThis ZIP27.4 min
Population density21,795.8 / sq miThis ZIP21,795.8 / sq mi

Business and tax activity

Business establishments2,046This ZIP2,046
Employees56,686This ZIP56,686
Annual payroll$6,490,837,000This ZIP$6,490,837,000
Tax returns filed25,570This ZIP25,570
Total adjusted gross income$3,077,409,000This ZIP$3,077,409,000

Land area

Land area2.05 sq miThis ZIP2.05 sq mi
Water area0.06 sq miThis ZIP0.06 sq mi

Other place names in 20001

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

ZIP codes near 20001

ZIPCityDistance
20060 Washington, DC 0.5 mi
20055 Washington, DC 0.6 mi
20536 Washington, DC 0.6 mi
20417 Washington, DC 0.7 mi
20420 Washington, DC 0.7 mi
20059 Washington, DC 0.8 mi
20548 Washington, DC 0.8 mi
20005 Washington, DC 0.8 mi
20404 Washington, DC 0.9 mi
20529 Washington, DC 0.9 mi

Find every ZIP code within 10 miles of 20001 →

Questions about this ZIP code

Where is ZIP code 20001?

20001 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 38.9104, -77.0177.

What county is 20001 in?

20001 lies in District of Columbia.

What area code is 20001?

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

What time zone is 20001 in?

20001 uses America/New_York.

How many people live in 20001?

About 44,616 people live in ZIP code 20001, in 23,868 households, at 21,795.8 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 20001?

$138,059 a year, against $109,870 across District of Columbia.

What ZIP codes are near 20001?

The closest are 20060 (0.5 mi), 20055 (0.6 mi), 20536 (0.6 mi), 20417 (0.7 mi) and 20420 (0.7 mi).

Is 20001 a PO Box ZIP code?

20001 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “20001 ZIP Code — Washington, District of Columbia.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20001

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