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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/45866

45866

ZIP 45866 is Montezuma, Ohio, in Mercer County; area codes 419 and 567; Eastern time.

Type
Standard
Time zone
America/New_York
County
Mercer
Metro area
Celina, OH
Population
117
Coordinates
40.4888, -84.5505
☼ Live from 45866 — Montezuma, OH

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Local time: —

Where 45866 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 45866
  • 🔢 Type 45866 into a pocket calculator and turn it upside down: ggBSh — not quite a word, sorry.
  • ➕ As a number, 45,866 = 2 × 17 × 19 × 71. Its digits add up to 29, a total 1,296 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011001100101010
  • 🏠 Its numerical neighbours: 45865 (Minster, OH, 11 mi away) and 45867 (Mount Blanchard, OH, 60 mi away).
  • 🔄 Backwards, 45866 becomes 66854 — and that is a real ZIP code: Hartford, KS, 630 miles away.
  • 👥 23 other ZIP codes are made of exactly the same digits (45686, 46856, 46865, 48656, 56468, 56684, …). The farthest-flung twin is 85646 in Tubac, AZ, 1,594 miles away.
  • 🧭 Farther north than 61% of all ZIP codes, and farther east than 58%.
  • 🎯741 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 45866 and you would come out at 40.49°S, 95.45°E — 1,277 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 04m of daylight. Shortest: 9h 16m.
  • 📏 At 0.102 square miles of land, 45866 is bigger than 1% of ZIP codes — about 49 football fields.
🌙 The sky over 45866 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population117This ZIP117
Households56This ZIP56
Housing units73This ZIP73
Median age52.5This ZIP52.5Ohio39.7US 38.9
Median household income$80,833This ZIP$80,833Ohio$71,389US $80,734
Median home value$110,900This ZIP$110,900Ohio$214,800US $332,700
Median gross rent$1,313This ZIP$1,313Ohio$1,034US $1,413
Bachelor's degree or higher20.0%This ZIP20.0%
Mean commute17.8 minThis ZIP17.8 min
Population density1,147.1 / sq miThis ZIP1,147.1 / sq mi

Land area

Land area0.10 sq miThis ZIP0.10 sq mi
Water area0.00 sq miThis ZIP0.00 sq mi

Other place names in 45866

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

ZIP codes near 45866

ZIPCityDistance
45826 Chickasaw, OH 4.7 mi
45822 Celina, OH 5.3 mi
45860 Maria Stein, OH 6.4 mi
45828 Coldwater, OH 7.0 mi
45883 Saint Henry, OH 7.2 mi
45869 New Bremen, OH 8.7 mi
45885 Saint Marys, OH 10.1 mi
45310 Burkettsville, OH 10.6 mi
45351 Osgood, OH 10.7 mi
45865 Minster, OH 11.4 mi

Find every ZIP code within 10 miles of 45866 →

Questions about this ZIP code

Where is ZIP code 45866?

45866 is in Montezuma, Ohio, in Mercer County, part of the Celina, OH micropolitan area. Its published point location is 40.4888, -84.5505.

What county is 45866 in?

45866 lies in Mercer County.

What area code is 45866?

Montezuma uses area codes 419 and 567, from NANPA's telephone records.

What time zone is 45866 in?

45866 uses America/New_York.

How many people live in 45866?

About 117 people live in ZIP code 45866, in 56 households, at 1,147.1 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 45866?

$80,833 a year, against $71,389 across Ohio.

What ZIP codes are near 45866?

The closest are 45826 (4.7 mi), 45822 (5.3 mi), 45860 (6.4 mi), 45828 (7 mi) and 45883 (7.2 mi).

Is 45866 a PO Box ZIP code?

45866 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “45866 ZIP Code — Montezuma, Ohio (Mercer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/45866

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