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/20594

20594

ZIP 20594 is in Washington, District of Columbia; area codes 202 and 771; Eastern time. Washington has 271 ZIP codes in all.

Type
No street area
Time zone
America/New_York
Coordinates
38.8849, -77.0184

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 20024, whose figures describe that area — not this ZIP code.

☼ Live from 20594 — Washington, DC

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Where 20594 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 20594
  • 🔢 Type 20594 into a pocket calculator and turn it upside down: hGSOZ — not quite a word, sorry.
  • ➕ As a number, 20,594 = 2 × 7 × 1471. Its digits add up to 20, a total 2,586 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101000001110010
  • 🏠 Its numerical neighbours: 20593 (Washington, DC, 1 mi away) and 20597 (Washington, DC, 1 mi away).
  • 🔄 Backwards, 20594 becomes 49502 — and that is a real ZIP code: Grand Rapids, MI, 532 miles away.
  • 👥 50 other ZIP codes are made of exactly the same digits (02459, 02495, 04259, 04925, 04952, 05492, …). The farthest-flung twin is 09245 in APO AE, a military post office, 4,235 miles away.
  • 🧭 Farther south than 52% 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 20594 and you would come out at 38.88°S, 102.98°E — 868 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
🌙 The sky over 20594 today
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Source: USGS.

Land area

ZIP codes near 20594

ZIPCityDistance
20411 Washington, DC 0.2 mi
20414 Washington, DC 0.2 mi
20590 Washington, DC 0.2 mi
20204 Washington, DC 0.2 mi
20591 Washington, DC 0.3 mi
20553 Washington, DC 0.3 mi
20447 Washington, DC 0.4 mi
20565 Washington, DC 0.4 mi
20260 Washington, DC 0.4 mi
20546 Washington, DC 0.4 mi

Find every ZIP code within 10 miles of 20594 →

Questions about this ZIP code

Where is ZIP code 20594?

20594 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 38.8849, -77.0184.

What county is 20594 in?

20594 lies in District of Columbia.

What area code is 20594?

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

What time zone is 20594 in?

20594 uses America/New_York.

What ZIP codes are near 20594?

The closest are 20411 (0.2 mi), 20414 (0.2 mi), 20590 (0.2 mi), 20204 (0.2 mi) and 20591 (0.3 mi).

Is 20594 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “20594 ZIP Code — Washington, District of Columbia.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20594

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/20594.json

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