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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/45342

45342

ZIP 45342 is in Miamisburg, Ohio, mostly in Montgomery County; area codes 937 and 326; Eastern time. Miamisburg has 2 ZIP codes; the other is 45343.

Type
Standard
Time zone
America/New_York
County
Montgomery +1 more
Population
36,152
Coordinates
39.6293, -84.2760
☼ Live from 45342 — Miamisburg, OH

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Where 45342 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 45342
  • 🔢 Type 45342 into a pocket calculator and turn it upside down: ZhESh — not quite a word, sorry.
  • ➕ As a number, 45,342 = 2 × 3 × 3 × 11 × 229. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011000100011110
  • 🏠 Its numerical neighbours: 45341 (Medway, OH, 22 mi away) and 45343 (Miamisburg, OH, 8 mi away).
  • 🔄 Backwards, 45342 becomes 24354 — and that is a real ZIP code: Marion, VA, 244 miles away.
  • 👥 31 other ZIP codes are made of exactly the same digits (23454, 24354, 24435, 24534, 24543, 25434, …). The farthest-flung twin is 34452 in Inverness, FL, 759 miles away.
  • 🧭 Farther north than 53% of all ZIP codes, and farther east than 59%.
  • 🎯759 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 45342 and you would come out at 39.63°S, 95.72°E — 1,243 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 22m.
  • 📏 At 34.3 square miles of land, 45342 is bigger than 49% of ZIP codes — room for about 26 Central Parks.
🌙 The sky over 45342 today
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🌋 Shake report
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Source: USGS.

People and housing

Population36,152This ZIP36,152
Households15,157This ZIP15,157
Housing units15,927This ZIP15,927
Median age38.3This ZIP38.3Ohio39.7US 38.9
Median household income$84,907This ZIP$84,907Ohio$71,389US $80,734
Median home value$230,300This ZIP$230,300Ohio$214,800US $332,700
Median gross rent$1,312This ZIP$1,312Ohio$1,034US $1,413
Bachelor's degree or higher33.3%This ZIP33.3%
Mean commute25.8 minThis ZIP25.8 min
Population density1,053.7 / sq miThis ZIP1,053.7 / sq mi

Business and tax activity

Business establishments798This ZIP798
Employees26,858This ZIP26,858
Annual payroll$2,218,313,000This ZIP$2,218,313,000
Tax returns filed18,560This ZIP18,560
Total adjusted gross income$1,272,846,000This ZIP$1,272,846,000

Land area

Land area34.31 sq miThis ZIP34.31 sq mi
Water area0.44 sq miThis ZIP0.44 sq mi

Counties 45342 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Montgomery County 98.4%
Warren County 1.6%

Other place names in 45342

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

ZIP codes near 45342

ZIPCityDistance
45449 Dayton, OH 3.1 mi
45439 Dayton, OH 5.4 mi
45459 Dayton, OH 5.9 mi
45066 Springboro, OH 6.4 mi
45458 Dayton, OH 6.6 mi
45327 Germantown, OH 6.8 mi
45005 Franklin, OH 7.0 mi
45429 Dayton, OH 7.1 mi
45417 Dayton, OH 7.2 mi
45428 Dayton, OH 7.8 mi

Find every ZIP code within 10 miles of 45342 →

Questions about this ZIP code

Where is ZIP code 45342?

45342 is in Miamisburg, Ohio, in Montgomery County, part of the Dayton-Kettering-Beavercreek, OH metropolitan area. Its published point location is 39.6293, -84.2760.

What county is 45342 in?

45342 spans 2 counties: Montgomery County and Warren County. Most of it falls in Montgomery County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 45342?

Miamisburg uses area codes 937 and 326, from NANPA's telephone records.

What time zone is 45342 in?

45342 uses America/New_York.

How many people live in 45342?

About 36,152 people live in ZIP code 45342, in 15,157 households, at 1,053.7 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 45342?

$84,907 a year, against $71,389 across Ohio.

What ZIP codes are near 45342?

The closest are 45449 (3.1 mi), 45439 (5.4 mi), 45459 (5.9 mi), 45066 (6.4 mi) and 45458 (6.6 mi).

Is 45342 a PO Box ZIP code?

45342 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “45342 ZIP Code — Miamisburg, Ohio (Montgomery County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/45342

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