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/20885

20885

ZIP 20885 is in Gaithersburg, Maryland, in Montgomery County; area codes 240, 301 and 227; Eastern time. Gaithersburg has 9 ZIP codes in all.

Type
No street area
Time zone
America/New_York
County
Montgomery
Coordinates
39.1874, -77.2028

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 20886, whose figures describe that area — not this ZIP code.

☼ Live from 20885 — Gaithersburg, MD

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Where 20885 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 20885
  • 🔢 Type 20885 into a pocket calculator and turn it upside down: SBBOZ — not quite a word, sorry.
  • ➕ As a number, 20,885 = 5 × 4177. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101000110010101
  • 🏠 Its numerical neighbours: 20884 (Gaithersburg, MD, 3 mi away) and 20886 (Montgomery Village, MD, 0 mi away).
  • 🔄 Backwards, 20885 becomes 58802 — and that is a real ZIP code: Williston, ND, 1,449 miles away.
  • 👥 26 other ZIP codes are made of exactly the same digits (02858, 02885, 05828, 08528, 08825, 08852, …). The farthest-flung twin is 85082 in Phoenix, AZ, 1,969 miles away.
  • 🧭 Farther north than 50% of all ZIP codes, and farther east than 81%.
  • 🎯1,138 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20885 and you would come out at 39.19°S, 102.80°E — 887 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
🌙 The sky over 20885 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

Business and tax activity

Business establishments3This ZIP3
Employees88This ZIP88
Annual payroll$9,970,000This ZIP$9,970,000

Land area

ZIP codes near 20885

ZIPCityDistance
20886 Montgomery Village, MD 0.1 mi
20876 Germantown, MD 2.1 mi
20879 Gaithersburg, MD 2.5 mi
20813 Bethesda, MD 3.0 mi
20827 Bethesda, MD 3.0 mi
20848 Rockville, MD 3.0 mi
20859 Potomac, MD 3.0 mi
20875 Germantown, MD 3.0 mi
20884 Gaithersburg, MD 3.0 mi
20897 Suburb Maryland Fac, MD 3.0 mi

Find every ZIP code within 10 miles of 20885 →

Questions about this ZIP code

Where is ZIP code 20885?

20885 is in Gaithersburg, Maryland, in Montgomery County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 39.1874, -77.2028.

What county is 20885 in?

20885 lies in Montgomery County.

What area code is 20885?

Gaithersburg uses area codes 240, 301 and 227, from NANPA's telephone records.

What time zone is 20885 in?

20885 uses America/New_York.

What ZIP codes are near 20885?

The closest are 20886 (0.1 mi), 20876 (2.1 mi), 20879 (2.5 mi), 20813 (3 mi) and 20827 (3 mi).

Is 20885 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. “20885 ZIP Code — Gaithersburg, Maryland (Montgomery County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20885

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curl https://zipcodes.pro/zip/20885.json

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