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/MOST-TAX-RETURNS

ZIP Codes With the Most Tax Returns Filed in Wyoming

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 82009 Cheyenne Laramie 18,180
2 82001 Cheyenne Laramie 17,610
3 82801 Sheridan Sheridan 13,290
4 82901 Rock Springs Sweetwater 12,190
5 82604 Casper Natrona 11,980
6 82601 Casper Natrona 11,860
7 82718 Gillette Campbell 11,110
8 82007 Cheyenne Laramie 9,840
9 82609 Casper Natrona 8,960
10 82070 Laramie Albany 8,570
11 82414 Cody Park 8,480
12 82501 Riverton Fremont 7,750
13 82716 Gillette Campbell 7,330
14 82072 Laramie Albany 6,680
15 83001 Jackson Teton 6,210
16 82930 Evanston Summit 5,960
17 82435 Powell Park 5,830
18 82520 Lander Fremont 5,510
19 82935 Green River Sweetwater 5,500
20 83002 Jackson Teton 5,430
21 82633 Douglas Converse 4,390
22 82240 Torrington Goshen 4,070
23 82834 Buffalo Johnson 3,830
24 82301 Rawlins Carbon 3,700
25 82401 Worland Washakie 3,330
26 82201 Wheatland Platte 3,010
27 82941 Pinedale Sublette 2,510
28 83110 Afton Lincoln 2,310
29 82701 Newcastle Weston 2,300
30 82636 Evansville Natrona 2,250
31 82443 Thermopolis Hot Springs 2,050
32 83127 Thayne Lincoln 1,890
33 83014 Wilson Teton 1,860
34 82637 Glenrock Converse 1,800
35 82431 Lovell Big Horn 1,580
36 82937 Lyman Uinta 1,380
37 82721 Moorcroft Crook 1,350
38 83101 Kemmerer Lincoln 1,330
39 82331 Saratoga Carbon 1,280
40 82729 Sundance Crook 1,280
41 83128 Alpine Lincoln 1,180
42 82426 Greybull Big Horn 1,150
43 82514 Fort Washakie Fremont 1,120
44 82513 Dubois Fremont 1,030
45 83113 Big Piney Sublette 960
46 82727 Rozet Campbell 840
47 82225 Lusk Niobrara 810
48 82410 Basin Big Horn 800
49 82082 Pine Bluffs Laramie 760
50 82839 Ranchester Sheridan 760

Showing the top 50 of 105 ZIP codes in Wyoming that have this figure . 82009 ranks 1st at 18,180, against 760 in 50th place.

Other rankings for Wyoming

Cite this page

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

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