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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/21609

21609

ZIP 21609 is Bethlehem, Maryland, in Caroline County; area codes 667 and 410; Eastern time.

Type
No street area
Time zone
America/New_York
County
Caroline
Metro area
none
Coordinates
38.7406, -75.9587

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 21655, whose figures describe that area — not this ZIP code.

☼ Live from 21609 — Bethlehem, MD

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Where 21609 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 21609
  • 🔢 Type 21609 into a pocket calculator and turn it upside down: GOgIZ — not quite a word, sorry.
  • ➕ As a number, 21,609 = 3 × 3 × 7 × 7 × 7 × 7. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101010001101001
  • 🏠 Its numerical neighbours: 21607 (Barclay, MD, 28 mi away) and 21610 (Betterton, MD, 44 mi away).
  • 🔄 Backwards, 21609 becomes 90612, which is not a ZIP code at all.
  • 👥 54 other ZIP codes are made of exactly the same digits (02169, 02196, 02916, 06129, 06912, 06921, …). The farthest-flung twin is 96201 in APO AA, a military post office, 7,124 miles away.
  • 🧭 Farther south than 53% of all ZIP codes, and farther east than 85%.
  • 🎯1,209 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21609 and you would come out at 38.74°S, 104.04°E — 814 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 53m of daylight. Shortest: 9h 27m.
🌙 The sky over 21609 today
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Source: USGS.

Land area

ZIP codes near 21609

ZIPCityDistance
21655 Preston, MD 2.5 mi
21601 Easton, MD 7.8 mi
21643 Hurlock, MD 8.1 mi
21673 Trappe, MD 8.2 mi
21625 Cordova, MD 8.6 mi
21664 Secretary, MD 9.2 mi
21654 Oxford, MD 10.0 mi
21632 Federalsburg, MD 10.1 mi
21629 Denton, MD 10.9 mi
21631 East New Market, MD 11.0 mi

Find every ZIP code within 10 miles of 21609 →

Questions about this ZIP code

Where is ZIP code 21609?

21609 is in Bethlehem, Maryland, in Caroline County. Its published point location is 38.7406, -75.9587.

What county is 21609 in?

21609 lies in Caroline County.

What area code is 21609?

Bethlehem uses area codes 667 and 410, from NANPA's telephone records.

What time zone is 21609 in?

21609 uses America/New_York.

What ZIP codes are near 21609?

The closest are 21655 (2.5 mi), 21601 (7.8 mi), 21643 (8.1 mi), 21673 (8.2 mi) and 21625 (8.6 mi).

Is 21609 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. “21609 ZIP Code — Bethlehem, Maryland (Caroline County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21609

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/21609.json

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