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/43550

43550

ZIP 43550 is Okolona, Ohio, in Henry County; area code 419; Eastern time.

Type
No street area
Time zone
America/New_York
County
Henry
Metro area
none
Coordinates
41.3267, -84.1117

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 43545, whose figures describe that area — not this ZIP code.

☼ Live from 43550 — Okolona, OH

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Where 43550 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 43550
  • 🔢 Type 43550 into a pocket calculator and turn it upside down: OSSEh — not quite a word, sorry.
  • ➕ As a number, 43,550 = 2 × 5 × 5 × 13 × 67. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1010101000011110
  • 🏠 Its numerical neighbours: 43549 (Ney, OH, 22 mi away) and 43551 (Perrysburg, OH, 31 mi away).
  • 🔄 Backwards, 43550 becomes 05534, which is not a ZIP code at all.
  • 👥 36 other ZIP codes are made of exactly the same digits (03455, 04355, 04535, 04553, 05345, 05354, …). The farthest-flung twin is 04553 in Newcastle, ME, 761 miles away.
  • 🧭 Farther north than 69% of all ZIP codes, and farther east than 60%.
  • 🎯765 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 43550 and you would come out at 41.33°S, 95.89°E — 1,278 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 10m of daylight. Shortest: 9h 11m.
🌙 The sky over 43550 today
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Source: USGS.

Land area

ZIP codes near 43550

ZIPCityDistance
43545 Napoleon, OH 4.6 mi
43535 Malinta, OH 4.8 mi
43523 Grelton, OH 5.9 mi
43527 Holgate, OH 6.1 mi
43524 Hamler, OH 7.9 mi
43530 Jewell, OH 9.2 mi
43534 Mc Clure, OH 9.7 mi
43548 New Bavaria, OH 10.1 mi
43555 Ridgeville Corners, OH 10.7 mi
43532 Liberty Center, OH 11.4 mi

Find every ZIP code within 10 miles of 43550 →

Questions about this ZIP code

Where is ZIP code 43550?

43550 is in Okolona, Ohio, in Henry County. Its published point location is 41.3267, -84.1117.

What county is 43550 in?

43550 lies in Henry County.

What area code is 43550?

Okolona uses area code 419, from NANPA's telephone records.

What time zone is 43550 in?

43550 uses America/New_York.

What ZIP codes are near 43550?

The closest are 43545 (4.6 mi), 43535 (4.8 mi), 43523 (5.9 mi), 43527 (6.1 mi) and 43524 (7.9 mi).

Is 43550 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. “43550 ZIP Code — Okolona, Ohio (Henry County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/43550

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/43550.json

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