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/WY/LARGEST-AREA

Largest ZIP Codes in Wyoming 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 82190 Yellowstone National Park Park 2,969.91 sq mi
2 82414 Cody Park 2,706.89 sq mi
3 82633 Douglas Converse 2,575.48 sq mi
4 82701 Newcastle Weston 1,798.49 sq mi
5 82834 Buffalo Johnson 1,686.18 sq mi
6 82201 Wheatland Platte 1,658.78 sq mi
7 82718 Gillette Campbell 1,596.73 sq mi
8 82520 Lander Fremont 1,493.45 sq mi
9 82513 Dubois Fremont 1,444.55 sq mi
10 82009 Cheyenne Laramie 1,277.77 sq mi
11 82716 Gillette Campbell 1,182.71 sq mi
12 82639 Kaycee Johnson 1,117.94 sq mi
13 82225 Lusk Niobrara 1,113.47 sq mi
14 82901 Rock Springs Sweetwater 1,077.46 sq mi
15 82443 Thermopolis Hot Springs 1,053.94 sq mi
16 82604 Casper Natrona 1,048.37 sq mi
17 82070 Laramie Albany 1,014.23 sq mi
18 82923 Boulder Sublette 998.82 sq mi
19 83113 Big Piney Sublette 959.57 sq mi
20 82930 Evanston Summit 956.55 sq mi
21 82301 Rawlins Carbon 933.26 sq mi
22 83013 Moran Teton 890.23 sq mi
23 82435 Powell Park 774.76 sq mi
24 82433 Meeteetse Park 763.22 sq mi
25 82925 Cora Sublette 705.06 sq mi
26 82512 Crowheart Fremont 697.93 sq mi
27 82721 Moorcroft Crook 696.83 sq mi
28 82501 Riverton Fremont 694.24 sq mi
29 82941 Pinedale Sublette 668.40 sq mi
30 82240 Torrington Goshen 664.74 sq mi
31 82637 Glenrock Converse 637.65 sq mi
32 82720 Hulett Crook 615.51 sq mi
33 82442 Ten Sleep Washakie 614.63 sq mi
34 82730 Upton Weston 600.96 sq mi
35 82831 Arvada Campbell 594.95 sq mi
36 82649 Shoshoni Fremont 588.19 sq mi
37 82401 Worland Washakie 563.70 sq mi
38 82729 Sundance Crook 536.40 sq mi
39 83101 Kemmerer Lincoln 530.14 sq mi
40 82801 Sheridan Sheridan 526.67 sq mi
41 82835 Clearmont Sheridan 511.11 sq mi
42 82331 Saratoga Carbon 509.57 sq mi
43 82336 Wamsutter Sweetwater 484.19 sq mi
44 83001 Jackson Teton 481.43 sq mi
45 82431 Lovell Big Horn 479.89 sq mi
46 82601 Casper Natrona 478.77 sq mi
47 82523 Pavillion Fremont 476.60 sq mi
48 82325 Encampment Carbon 438.32 sq mi
49 82727 Rozet Campbell 432.44 sq mi
50 82620 Alcova Natrona 410.43 sq mi

Showing the top 50 of 179 ZIP codes in Wyoming that have this figure and meet the threshold above. 82190 ranks 1st at 2,969.91 sq mi, against 410.43 sq mi in 50th place.

Other rankings for Wyoming

Cite this page

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

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