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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/48131

48131

ZIP 48131 is Dundee, Michigan, in Monroe County; area code 734; Eastern time.

Type
Standard
Time zone
America/Detroit
County
Monroe
Metro area
Monroe, MI
Population
8,637
Coordinates
41.9668, -83.6733
☼ Live from 48131 — Dundee, MI

Weather right now

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Local time: —

Where 48131 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 48131
  • 🔢 Type 48131 into a pocket calculator and turn it upside down: IEIBh — not quite a word, sorry.
  • ➕ 48131 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 17, a total 2,133 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011110000000011
  • 🏠 Its numerical neighbours: 48130 (Dexter, MI, 30 mi away) and 48133 (Erie, MI, 16 mi away).
  • 🔄 Backwards, 48131 becomes 13184, which is not a ZIP code at all.
  • 👥 26 other ZIP codes are made of exactly the same digits (13148, 13418, 13814, 13841, 14138, 14813, …). The farthest-flung twin is 84131 in Salt Lake City, UT, 1,461 miles away.
  • 🧭 Farther north than 75% of all ZIP codes, and farther east than 61%.
  • 🎯791 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 48131 and you would come out at 41.97°S, 96.33°E — 1,277 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 14m of daylight. Shortest: 9h 07m.
  • 📏 At 50.1 square miles of land, 48131 is bigger than 60% of ZIP codes — room for about 38 Central Parks.
🌙 The sky over 48131 today
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🌋 Shake report
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Source: USGS.

People and housing

Population8,637This ZIP8,637
Households3,656This ZIP3,656
Housing units3,852This ZIP3,852
Median age36.2This ZIP36.2Michigan40.2US 38.9
Median household income$85,747This ZIP$85,747Michigan$72,875US $80,734
Median home value$274,200This ZIP$274,200Michigan$231,600US $332,700
Median gross rent$1,243This ZIP$1,243Michigan$1,129US $1,413
Bachelor's degree or higher34.6%This ZIP34.6%
Mean commute29.4 minThis ZIP29.4 min
Population density172.5 / sq miThis ZIP172.5 / sq mi

Business and tax activity

Business establishments175This ZIP175
Employees3,780This ZIP3,780
Annual payroll$208,492,000This ZIP$208,492,000
Tax returns filed4,170This ZIP4,170
Total adjusted gross income$299,800,000This ZIP$299,800,000

Land area

Land area50.08 sq miThis ZIP50.08 sq mi
Water area0.45 sq miThis ZIP0.45 sq mi

Other place names in 48131

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

ZIP codes near 48131

ZIPCityDistance
48110 Azalia, MI 2.9 mi
49270 Petersburg, MI 6.4 mi
49238 Deerfield, MI 7.3 mi
48159 Maybee, MI 7.5 mi
48140 Ida, MI 7.5 mi
48160 Milan, MI 8.0 mi
49229 Britton, MI 8.1 mi
48161 Monroe, MI 11.1 mi
48190 Whittaker, MI 11.9 mi
48191 Willis, MI 12.0 mi

Find every ZIP code within 10 miles of 48131 →

Questions about this ZIP code

Where is ZIP code 48131?

48131 is in Dundee, Michigan, in Monroe County, part of the Monroe, MI metropolitan area. Its published point location is 41.9668, -83.6733.

What county is 48131 in?

48131 lies in Monroe County.

What area code is 48131?

Dundee uses area code 734, from NANPA's telephone records.

What time zone is 48131 in?

48131 uses America/Detroit.

How many people live in 48131?

About 8,637 people live in ZIP code 48131, in 3,656 households, at 172.5 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 48131?

$85,747 a year, against $72,875 across Michigan.

What ZIP codes are near 48131?

The closest are 48110 (2.9 mi), 49270 (6.4 mi), 49238 (7.3 mi), 48159 (7.5 mi) and 48140 (7.5 mi).

Is 48131 a PO Box ZIP code?

48131 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “48131 ZIP Code — Dundee, Michigan (Monroe County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/48131

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