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 — RANKINGS/WI/YOUNGEST

ZIP Codes With the Youngest Population in Wisconsin

What this measures. Median age of residents, lowest first. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 53706 Madison Dane 19.0
2 53715 Madison Dane 21.0
3 53233 Milwaukee Milwaukee 22.3
4 54422 Curtiss Clark 22.9
5 53726 Madison Dane 23.6
6 53190 Whitewater Walworth 23.7
7 53703 Madison Dane 24.8
8 53818 Platteville Grant 24.8
9 54670 Wilton Monroe 25.2
10 54464 Phlox Langlade 25.8
11 53926 Dalton Green Lake 25.9
12 53942 Lime Ridge Sauk 27.6
13 53205 Milwaukee Milwaukee 27.9
14 54855 Marengo Ashland 27.9
15 53937 Hillpoint Sauk 28.1
16 53404 Racine Racine 28.5
17 53224 Milwaukee Milwaukee 29.6
18 53204 Milwaukee Milwaukee 29.8
19 53713 Madison Dane 30.0
20 53031 Hingham Sheboygan 30.1
21 54481 Stevens Point Portage 30.1
22 54150 Neopit Menominee 30.3
23 54446 Loyal Clark 30.5
24 53218 Milwaukee Milwaukee 30.6
25 54861 Odanah Ashland 30.7
26 54751 Menomonie Dunn 31.0
27 54901 Oshkosh Winnebago 31.0
28 53212 Milwaukee Milwaukee 31.1
29 53203 Milwaukee Milwaukee 31.6
30 53931 Fairwater Fond du Lac 31.6
31 53211 Milwaukee Milwaukee 31.7
32 53206 Milwaukee Milwaukee 31.8
33 53540 Gotham Richland 31.8
34 53215 Milwaukee Milwaukee 31.9
35 54425 Dorchester Clark 32.0
36 53202 Milwaukee Milwaukee 32.5
37 53225 Milwaukee Milwaukee 32.6
38 53210 Milwaukee Milwaukee 32.7
39 54601 La Crosse La Crosse 32.7
40 53047 Lebanon Dodge 32.8
41 53580 Rewey Iowa 32.8
42 54437 Greenwood Clark 32.9
43 53208 Milwaukee Milwaukee 33.0
44 53809 Fennimore Grant 33.0
45 54498 Withee Clark 33.0
46 53216 Milwaukee Milwaukee 33.2
47 54928 Caroline Shawano 33.4
48 54619 Cashton Monroe 33.5
49 54722 Augusta Eau Claire 33.5
50 54302 Green Bay Brown 33.8

Showing the top 50 of 775 ZIP codes in Wisconsin that have this figure . 53706 ranks 1st at 19.0, against 33.8 in 50th place.

Other rankings for Wisconsin

Cite this page

zipcodes.pro. “ZIP Codes With the Youngest Population in Wisconsin.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/wi/youngest

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