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-AREA

Largest ZIP Codes in Wisconsin by Land Area

What this measures. Land area of the Census tabulation area, in square miles. Water is excluded. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 54843 Hayward Sawyer 440.54 sq mi
2 54452 Merrill Lincoln 437.95 sq mi
3 54896 Winter Sawyer 415.61 sq mi
4 54501 Rhinelander Oneida 366.33 sq mi
5 54555 Phillips Price 364.22 sq mi
6 54552 Park Falls Price 360.30 sq mi
7 54830 Danbury Burnett 352.94 sq mi
8 54451 Medford Taylor 336.31 sq mi
9 54615 Black River Falls Jackson 316.13 sq mi
10 54466 Pittsville Wood 305.61 sq mi
11 54487 Tomahawk Lincoln 290.65 sq mi
12 54806 Ashland Ashland 288.86 sq mi
13 54656 Sparta Monroe 282.29 sq mi
14 54511 Argonne Forest 277.26 sq mi
15 54121 Florence Florence 272.04 sq mi
16 54542 Long Lake Forest 267.68 sq mi
17 54873 Solon Springs Douglas 265.19 sq mi
18 54755 Mondovi Buffalo 259.33 sq mi
19 54840 Grantsburg Burnett 255.24 sq mi
20 54838 Gordon Douglas 240.86 sq mi
21 54455 Mosinee Marathon 235.57 sq mi
22 54666 Warrens Monroe 235.10 sq mi
23 54114 Crivitz Marinette 232.67 sq mi
24 53581 Richland Center Richland 232.40 sq mi
25 54751 Menomonie Dunn 228.26 sq mi
26 54514 Butternut Ashland 227.66 sq mi
27 54456 Neillsville Clark 225.46 sq mi
28 54547 Mercer Iron 215.72 sq mi
29 54868 Rice Lake Barron 211.98 sq mi
30 54546 Mellen Ashland 211.64 sq mi
31 54856 Mason Bayfield 211.32 sq mi
32 54564 Tripoli Oneida 208.45 sq mi
33 54409 Antigo Langlade 206.70 sq mi
34 54174 Suring Oconto 202.88 sq mi
35 54435 Gleason Lincoln 201.50 sq mi
36 54527 Glidden Ashland 201.27 sq mi
37 54491 White Lake Langlade 198.26 sq mi
38 54801 Spooner Washburn 196.41 sq mi
39 54847 Iron River Bayfield 191.57 sq mi
40 54848 Ladysmith Rusk 190.45 sq mi
41 54235 Sturgeon Bay Door 190.28 sq mi
42 54411 Athens Marathon 189.48 sq mi
43 54521 Eagle River Vilas 188.36 sq mi
44 54821 Cable Bayfield 186.92 sq mi
45 53565 Mineral Point Iowa 186.01 sq mi
46 54104 Athelstane Marinette 185.55 sq mi
47 54665 Viroqua Vernon 180.97 sq mi
48 54859 Minong Washburn 179.92 sq mi
49 54177 Wausaukee Marinette 176.18 sq mi
50 54660 Tomah Monroe 173.17 sq mi

Showing the top 50 of 783 ZIP codes in Wisconsin that have this figure and meet the threshold above. 54843 ranks 1st at 440.54 sq mi, against 173.17 sq mi in 50th place.

Other rankings for Wisconsin

Cite this page

zipcodes.pro. “Largest ZIP Codes in Wisconsin by Land Area.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/wi/largest-area

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