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/48109

48109

ZIP 48109 is in Ann Arbor, Michigan, in Washtenaw County; area code 734; Eastern time. Ann Arbor has 8 ZIP codes in all.

Type
Standard
Time zone
America/Detroit
County
Washtenaw
Metro area
Ann Arbor, MI
Population
5,939
Coordinates
42.2912, -83.7082
☼ Live from 48109 — Ann Arbor, MI

Weather right now

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Local time: —

Where 48109 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 48109
  • 🔢 Type 48109 into a pocket calculator and turn it upside down: GOIBh — not quite a word, sorry.
  • ➕ 48109 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 22, a total 2,607 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011101111101101
  • 🏠 Its numerical neighbours: 48108 (Ann Arbor, MI, 5 mi away) and 48110 (Azalia, MI, 20 mi away).
  • 🔄 Backwards, 48109 becomes 90184, which is not a ZIP code at all.
  • 👥 48 other ZIP codes are made of exactly the same digits (01984, 04918, 04981, 09184, 09418, 09814, …). The farthest-flung twin is 09814 in APO AE, a military post office, 7,435 miles away.
  • 🧭 Farther north than 77% of all ZIP codes, and farther east than 61%.
  • 🎯792 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 48109 and you would come out at 42.29°S, 96.29°E — 1,288 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 17m of daylight. Shortest: 9h 05m.
  • 📏 At 1.4 square miles of land, 48109 is bigger than 10% of ZIP codes — room for about 1.1 Central Parks.
🌙 The sky over 48109 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population5,939This ZIP5,939
Households156This ZIP156
Housing units156This ZIP156
Median age19.1This ZIP19.1Michigan40.2US 38.9
Median household income$14,093This ZIP$14,093Michigan$72,875US $80,734
Median gross rent$1,453This ZIP$1,453Michigan$1,129US $1,413
Bachelor's degree or higher77.8%This ZIP77.8%
Mean commute16.3 minThis ZIP16.3 min
Population density4,257.3 / sq miThis ZIP4,257.3 / sq mi

Business and tax activity

Business establishments43This ZIP43
Employees20,213This ZIP20,213
Annual payroll$1,548,610,000This ZIP$1,548,610,000
Tax returns filed120This ZIP120
Total adjusted gross income$3,901,000This ZIP$3,901,000

Land area

Land area1.40 sq miThis ZIP1.40 sq mi
Water area0.03 sq miThis ZIP0.03 sq mi

Other place names in 48109

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

ZIP codes near 48109

ZIPCityDistance
48104 Ann Arbor, MI 2.1 mi
48105 Ann Arbor, MI 2.6 mi
48108 Ann Arbor, MI 5.0 mi
48198 Ypsilanti, MI 6.3 mi
48106 Ann Arbor, MI 7.1 mi
48107 Ann Arbor, MI 7.1 mi
48113 Ann Arbor, MI 7.1 mi
48103 Ann Arbor, MI 7.4 mi
48197 Ypsilanti, MI 7.6 mi
48189 Whitmore Lake, MI 9.0 mi

Find every ZIP code within 10 miles of 48109 →

Questions about this ZIP code

Where is ZIP code 48109?

48109 is in Ann Arbor, Michigan, in Washtenaw County, part of the Ann Arbor, MI metropolitan area. Its published point location is 42.2912, -83.7082.

What county is 48109 in?

48109 lies in Washtenaw County.

What area code is 48109?

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

What time zone is 48109 in?

48109 uses America/Detroit.

How many people live in 48109?

About 5,939 people live in ZIP code 48109, in 156 households, at 4,257.3 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 48109?

$14,093 a year, against $72,875 across Michigan.

What ZIP codes are near 48109?

The closest are 48104 (2.1 mi), 48105 (2.6 mi), 48108 (5 mi), 48198 (6.3 mi) and 48106 (7.1 mi).

Is 48109 a PO Box ZIP code?

48109 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “48109 ZIP Code — Ann Arbor, Michigan (Washtenaw County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/48109

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