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/53172

53172

ZIP 53172 is South Milwaukee, Wisconsin, in Milwaukee County; area codes 414 and 262; Central time.

Type
Standard
Time zone
America/Chicago
County
Milwaukee
Population
20,442
Coordinates
42.9120, -87.8597
☼ Live from 53172 — South Milwaukee, WI

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 53172 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 53172
  • 🔢 Type 53172 into a pocket calculator and turn it upside down: ZLIES — not quite a word, sorry.
  • ➕ As a number, 53,172 = 2 × 2 × 3 × 3 × 7 × 211. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1100111110110100
  • 🏠 Its numerical neighbours: 53171 (Somers, WI, 19 mi away) and 53176 (Springfield, WI, 34 mi away).
  • 🔄 Backwards, 53172 becomes 27135, which is not a ZIP code at all.
  • 👥 56 other ZIP codes are made of exactly the same digits (12537, 13752, 15237, 15327, 15723, 15732, …). The farthest-flung twin is 32751 in Maitland, FL, 1,051 miles away.
  • 🧭 Farther north than 82% of all ZIP codes, and farther west than 50%.
  • 🎯595 miles northeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 53172 and you would come out at 42.91°S, 92.14°E — 1,135 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 21m of daylight. Shortest: 9h 01m.
  • 📏 At 4.8 square miles of land, 53172 is bigger than 19% of ZIP codes — room for about 3.7 Central Parks.
🌙 The sky over 53172 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population20,442This ZIP20,442
Households8,420This ZIP8,420
Housing units8,885This ZIP8,885
Median age40.2This ZIP40.2Wisconsin40.2US 38.9
Median household income$73,427This ZIP$73,427Wisconsin$77,485US $80,734
Median home value$235,700This ZIP$235,700Wisconsin$266,500US $332,700
Median gross rent$1,014This ZIP$1,014Wisconsin$1,087US $1,413
Bachelor's degree or higher29.9%This ZIP29.9%
Mean commute24.2 minThis ZIP24.2 min
Population density4,235.8 / sq miThis ZIP4,235.8 / sq mi

Business and tax activity

Business establishments260This ZIP260
Employees3,491This ZIP3,491
Annual payroll$163,945,000This ZIP$163,945,000
Tax returns filed10,280This ZIP10,280
Total adjusted gross income$635,073,000This ZIP$635,073,000

Land area

Land area4.83 sq miThis ZIP4.83 sq mi
Water area0.83 sq miThis ZIP0.83 sq mi

Other place names in 53172

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

ZIP codes near 53172

ZIPCityDistance
53110 Cudahy, WI 2.7 mi
53154 Oak Creek, WI 3.0 mi
53235 Saint Francis, WI 4.2 mi
53207 Milwaukee, WI 4.8 mi
53221 Milwaukee, WI 5.1 mi
53215 Milwaukee, WI 7.4 mi
53129 Greendale, WI 7.4 mi
53220 Milwaukee, WI 7.6 mi
53108 Caledonia, WI 7.9 mi
53132 Franklin, WI 7.9 mi

Find every ZIP code within 10 miles of 53172 →

Questions about this ZIP code

Where is ZIP code 53172?

53172 is in South Milwaukee, Wisconsin, in Milwaukee County, part of the Milwaukee-Waukesha, WI metropolitan area. Its published point location is 42.9120, -87.8597.

What county is 53172 in?

53172 lies in Milwaukee County.

What area code is 53172?

South Milwaukee uses area codes 414 and 262, from NANPA's telephone records.

What time zone is 53172 in?

53172 uses America/Chicago.

How many people live in 53172?

About 20,442 people live in ZIP code 53172, in 8,420 households, at 4,235.8 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 53172?

$73,427 a year, against $77,485 across Wisconsin.

What ZIP codes are near 53172?

The closest are 53110 (2.7 mi), 53154 (3 mi), 53235 (4.2 mi), 53207 (4.8 mi) and 53221 (5.1 mi).

Is 53172 a PO Box ZIP code?

53172 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “53172 ZIP Code — South Milwaukee, Wisconsin (Milwaukee County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/53172

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/53172.json

Underlying data is public domain or openly licensed — sources, vintages and licences.