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/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in Wisconsin

What this measures. Number of individual income tax returns filed. A rough proxy for how many households a ZIP code contains, available where census figures are not. Source: IRS Statistics of Income, ZIP code data, data release 2026-10-12.

# ZIP City County Returns filed
1 53711 Madison Dane 26,280
2 53704 Madison Dane 25,640
3 54115 De Pere Brown 24,850
4 53215 Milwaukee Milwaukee 24,110
5 54956 Neenah Winnebago 23,670
6 53590 Sun Prairie Dane 22,980
7 53511 Beloit Rock 22,760
8 54915 Appleton Calumet 22,060
9 53081 Sheboygan Sheboygan 21,560
10 54601 La Crosse La Crosse 21,500
11 54703 Eau Claire Eau Claire 21,500
12 54313 Green Bay Brown 20,600
13 53051 Menomonee Falls Waukesha 20,500
14 54935 Fond Du Lac Fond du Lac 20,220
15 53066 Oconomowoc Waukesha 19,850
16 54220 Manitowoc Manitowoc 19,810
17 53209 Milwaukee Milwaukee 19,400
18 53154 Oak Creek Milwaukee 19,320
19 54701 Eau Claire Eau Claire 19,120
20 53221 Milwaukee Milwaukee 19,000
21 53207 Milwaukee Milwaukee 18,590
22 53132 Franklin Milwaukee 18,320
23 54311 Green Bay Brown 18,280
24 53188 Waukesha Waukesha 18,200
25 53719 Madison Dane 17,910
26 53214 Milwaukee Milwaukee 17,640
27 53219 Milwaukee Milwaukee 17,620
28 53151 New Berlin Waukesha 17,520
29 54729 Chippewa Falls Chippewa 17,390
30 54016 Hudson St. Croix 16,830
31 53402 Racine Racine 16,740
32 53142 Kenosha Kenosha 16,670
33 53186 Waukesha Waukesha 16,590
34 53218 Milwaukee Milwaukee 16,230
35 54401 Wausau Marathon 16,130
36 53593 Verona Dane 16,010
37 53546 Janesville Rock 15,970
38 54914 Appleton Outagamie 15,850
39 53211 Milwaukee Milwaukee 15,770
40 53562 Middleton Dane 15,600
41 54901 Oshkosh Winnebago 15,410
42 53204 Milwaukee Milwaukee 15,400
43 53202 Milwaukee Milwaukee 15,360
44 53105 Burlington Racine 15,110
45 53217 Milwaukee Milwaukee 14,790
46 54302 Green Bay Brown 14,740
47 54304 Green Bay Brown 14,520
48 53095 West Bend Washington 14,390
49 53072 Pewaukee Waukesha 14,350
50 54880 Superior Douglas 14,230

Showing the top 50 of 712 ZIP codes in Wisconsin that have this figure . 53711 ranks 1st at 26,280, against 14,230 in 50th place.

Other rankings for Wisconsin

Cite this page

zipcodes.pro. “ZIP Codes With the Most Tax Returns Filed in Wisconsin.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/wi/most-tax-returns

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