48191
ZIP 48191 is Willis, Michigan, mostly in Washtenaw County; area code 734; Eastern time.
- Type
- Standard
- Time zone
- America/Detroit
- County
- Washtenaw +1 more
- Metro area
- Ann Arbor, MI
- Population
- 4,403
- Coordinates
- 42.1211, -83.5657
Weather right now
Asking the National Weather Service…
Where 48191 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.
- 🔢 Type 48191 into a pocket calculator and turn it upside down: IGIBh — not quite a word, sorry.
- ➕ As a number, 48,191 = 11 × 13 × 337. Its digits add up to 23, a total 2,533 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1011110000111111 - 🏠 Its numerical neighbours: 48190 (Whittaker, MI, 2 mi away) and 48192 (Wyandotte, MI, 22 mi away).
- 🔄 Backwards, 48191 becomes 19184 — and that is a real ZIP code: Philadelphia, PA, 464 miles away.
- 👥 22 other ZIP codes are made of exactly the same digits (11948, 14819, 14891, 18419, 18914, 19148, …). The farthest-flung twin is 94118 in San Francisco, CA, 2,064 miles away.
- 🧭 Farther north than 76% of all ZIP codes, and farther east than 61%.
- 🎯798 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 48191 and you would come out at 42.12°S, 96.43°E — 1,277 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 15m of daylight. Shortest: 9h 06m.
- 📏 At 16.1 square miles of land, 48191 is bigger than 34% of ZIP codes — room for about 12 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 4,403This ZIP4,403 |
|---|---|
| Households | 1,662This ZIP1,662 |
| Housing units | 1,708This ZIP1,708 |
| Median age | 47.2This ZIP47.2Michigan40.2US 38.9 |
| Median household income | $102,833This ZIP$102,833Michigan$72,875US $80,734 |
| Median home value | $271,900This ZIP$271,900Michigan$231,600US $332,700 |
| Median gross rent | $1,387This ZIP$1,387Michigan$1,129US $1,413 |
| Bachelor's degree or higher | 24.4%This ZIP24.4% |
| Mean commute | 28.5 minThis ZIP28.5 min |
| Population density | 273.2 / sq miThis ZIP273.2 / sq mi |
Business and tax activity
| Business establishments | 46This ZIP46 |
|---|---|
| Employees | 244This ZIP244 |
| Annual payroll | $12,160,000This ZIP$12,160,000 |
| Tax returns filed | 1,920This ZIP1,920 |
| Total adjusted gross income | $136,917,000This ZIP$136,917,000 |
Land area
| Land area | 16.12 sq miThis ZIP16.12 sq mi |
|---|---|
| Water area | 0.06 sq miThis ZIP0.06 sq mi |
Counties 48191 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Washtenaw County | 87.7% |
| Monroe County | 12.3% |
ZIP codes near 48191
| ZIP | City | Distance |
|---|---|---|
48190 | Whittaker, MI | 2.1 mi |
48111 | Belleville, MI | 5.8 mi |
48197 | Ypsilanti, MI | 6.3 mi |
48160 | Milan, MI | 6.4 mi |
48159 | Maybee, MI | 6.7 mi |
48112 | Belleville, MI | 7.1 mi |
48164 | New Boston, MI | 8.7 mi |
48110 | Azalia, MI | 9.3 mi |
48117 | Carleton, MI | 9.4 mi |
48198 | Ypsilanti, MI | 10.7 mi |
Find every ZIP code within 10 miles of 48191 →
Questions about this ZIP code
Where is ZIP code 48191?
48191 is in Willis, Michigan, in Washtenaw County, part of the Ann Arbor, MI metropolitan area. Its published point location is 42.1211, -83.5657.
What county is 48191 in?
48191 spans 2 counties: Washtenaw County and Monroe County. Most of it falls in Washtenaw 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 48191?
Willis uses area code 734, from NANPA's telephone records.
What time zone is 48191 in?
48191 uses America/Detroit.
How many people live in 48191?
About 4,403 people live in ZIP code 48191, in 1,662 households, at 273.2 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 48191?
$102,833 a year, against $72,875 across Michigan.
What ZIP codes are near 48191?
The closest are 48190 (2.1 mi), 48111 (5.8 mi), 48197 (6.3 mi), 48160 (6.4 mi) and 48159 (6.7 mi).
Is 48191 a PO Box ZIP code?
48191 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “48191 ZIP Code — Willis, Michigan (Washtenaw County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/48191
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/48191.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.