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/LARGEST-POPULATION

ZIP Codes With the Largest Population in Wisconsin

What this measures. Population of the Census tabulation area, ACS 5-year estimate. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Population
1 53215 Milwaukee Milwaukee 58,146
2 53711 Madison Dane 51,279
3 54115 De Pere Brown 50,411
4 54601 La Crosse La Crosse 50,397
5 53511 Beloit Rock 48,701
6 53704 Madison Dane 46,730
7 54956 Neenah Winnebago 46,567
8 53590 Sun Prairie Dane 45,602
9 53209 Milwaukee Milwaukee 45,170
10 54915 Appleton Calumet 44,367
11 54703 Eau Claire Eau Claire 44,153
12 53081 Sheboygan Sheboygan 43,381
13 54701 Eau Claire Eau Claire 43,014
14 54935 Fond Du Lac Fond du Lac 41,613
15 54313 Green Bay Brown 41,422
16 53218 Milwaukee Milwaukee 41,196
17 54220 Manitowoc Manitowoc 40,949
18 53204 Milwaukee Milwaukee 39,996
19 53051 Menomonee Falls Waukesha 39,559
20 53221 Milwaukee Milwaukee 38,044
21 54311 Green Bay Brown 37,879
22 53703 Madison Dane 37,659
23 53066 Oconomowoc Waukesha 37,558
24 53154 Oak Creek Milwaukee 37,325
25 54901 Oshkosh Winnebago 37,294
26 53132 Franklin Milwaukee 35,433
27 53188 Waukesha Waukesha 34,892
28 53402 Racine Racine 34,850
29 53219 Milwaukee Milwaukee 34,764
30 53214 Milwaukee Milwaukee 34,480
31 54729 Chippewa Falls Chippewa 34,366
32 53207 Milwaukee Milwaukee 34,313
33 53211 Milwaukee Milwaukee 34,234
34 53142 Kenosha Kenosha 34,144
35 53719 Madison Dane 34,115
36 54016 Hudson St. Croix 33,398
37 53186 Waukesha Waukesha 33,374
38 53151 New Berlin Waukesha 32,824
39 54914 Appleton Outagamie 31,849
40 54401 Wausau Marathon 31,692
41 53593 Verona Dane 31,081
42 53216 Milwaukee Milwaukee 30,345
43 54302 Green Bay Brown 30,333
44 54880 Superior Douglas 30,312
45 53140 Kenosha Kenosha 30,238
46 53217 Milwaukee Milwaukee 29,957
47 53546 Janesville Rock 29,867
48 53562 Middleton Dane 29,790
49 53212 Milwaukee Milwaukee 28,938
50 53223 Milwaukee Milwaukee 28,793

Showing the top 50 of 783 ZIP codes in Wisconsin that have this figure . 53215 ranks 1st at 58,146, against 28,793 in 50th place.

Other rankings for Wisconsin

Cite this page

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

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