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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/45420

45420

ZIP 45420 is in Dayton, Ohio, in Montgomery County; area codes 937 and 326; Eastern time. Dayton has 43 ZIP codes in all.

Type
Standard
Time zone
America/New_York
County
Montgomery
Population
24,411
Coordinates
39.7188, -84.1292
☼ Live from 45420 — Dayton, OH

Weather right now

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Local time: —

Where 45420 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 45420
  • 🔢 Type 45420 into a pocket calculator and turn it upside down: OZhSh — not quite a word, sorry.
  • ➕ As a number, 45,420 = 2 × 2 × 3 × 5 × 757. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011000101101100
  • 🏠 Its numerical neighbours: 45419 (Dayton, OH, 2 mi away) and 45422 (Dayton, OH, 5 mi away).
  • 🔄 Backwards, 45420 becomes 02454 — and that is a real ZIP code: Waltham, MA, 695 miles away.
  • 👥 34 other ZIP codes are made of exactly the same digits (02445, 02454, 04254, 05442, 20544, 24054, …). The farthest-flung twin is 04254 in Livermore Falls, ME, 787 miles away.
  • 🧭 Farther north than 54% of all ZIP codes, and farther east than 59%.
  • 🎯767 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 45420 and you would come out at 39.72°S, 95.87°E — 1,238 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 21m.
  • 📏 At 6.4 square miles of land, 45420 is bigger than 22% of ZIP codes — room for about 4.9 Central Parks.
🌙 The sky over 45420 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population24,411This ZIP24,411
Households11,985This ZIP11,985
Housing units12,450This ZIP12,450
Median age36.8This ZIP36.8Ohio39.7US 38.9
Median household income$60,588This ZIP$60,588Ohio$71,389US $80,734
Median home value$131,300This ZIP$131,300Ohio$214,800US $332,700
Median gross rent$985This ZIP$985Ohio$1,034US $1,413
Bachelor's degree or higher27.9%This ZIP27.9%
Mean commute21.2 minThis ZIP21.2 min
Population density3,788.2 / sq miThis ZIP3,788.2 / sq mi

Business and tax activity

Business establishments329This ZIP329
Employees7,240This ZIP7,240
Annual payroll$372,748,000This ZIP$372,748,000
Tax returns filed12,490This ZIP12,490
Total adjusted gross income$620,190,000This ZIP$620,190,000

Land area

Land area6.44 sq miThis ZIP6.44 sq mi
Water area0.02 sq miThis ZIP0.02 sq mi

Other place names in 45420

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

ZIP codes near 45420

ZIPCityDistance
45419 Dayton, OH 2.1 mi
45410 Dayton, OH 2.5 mi
45432 Dayton, OH 2.7 mi
45430 Dayton, OH 2.8 mi
45429 Dayton, OH 3.0 mi
45469 Dayton, OH 3.0 mi
45409 Dayton, OH 3.1 mi
45403 Dayton, OH 3.3 mi
45440 Dayton, OH 3.5 mi
45479 Dayton, OH 3.6 mi

Find every ZIP code within 10 miles of 45420 →

Questions about this ZIP code

Where is ZIP code 45420?

45420 is in Dayton, Ohio, in Montgomery County, part of the Dayton-Kettering-Beavercreek, OH metropolitan area. Its published point location is 39.7188, -84.1292.

What county is 45420 in?

45420 lies in Montgomery County.

What area code is 45420?

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

What time zone is 45420 in?

45420 uses America/New_York.

How many people live in 45420?

About 24,411 people live in ZIP code 45420, in 11,985 households, at 3,788.2 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 45420?

$60,588 a year, against $71,389 across Ohio.

What ZIP codes are near 45420?

The closest are 45419 (2.1 mi), 45410 (2.5 mi), 45432 (2.7 mi), 45430 (2.8 mi) and 45429 (3 mi).

Is 45420 a PO Box ZIP code?

45420 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “45420 ZIP Code — Dayton, Ohio (Montgomery County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/45420

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