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-POPULATION

ZIP Codes With the Largest Population in Wyoming

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 82001 Cheyenne Laramie 38,168
2 82009 Cheyenne Laramie 35,081
3 82604 Casper Natrona 27,487
4 82901 Rock Springs Sweetwater 27,198
5 82601 Casper Natrona 26,721
6 82718 Gillette Campbell 26,619
7 82801 Sheridan Sheridan 26,310
8 82007 Cheyenne Laramie 21,704
9 82070 Laramie Albany 20,144
10 82501 Riverton Fremont 19,413
11 82609 Casper Natrona 18,714
12 83001 Jackson Teton 17,445
13 82072 Laramie Albany 16,931
14 82716 Gillette Campbell 16,817
15 82414 Cody Park 16,582
16 82930 Evanston Summit 14,435
17 82520 Lander Fremont 13,266
18 82435 Powell Park 12,337
19 82935 Green River Sweetwater 12,012
20 82240 Torrington Goshen 9,667
21 82633 Douglas Converse 9,317
22 82301 Rawlins Carbon 8,180
23 82834 Buffalo Johnson 7,588
24 82401 Worland Washakie 7,067
25 82201 Wheatland Platte 6,245
26 82701 Newcastle Weston 5,459
27 83110 Afton Lincoln 5,198
28 82941 Pinedale Sublette 4,679
29 82443 Thermopolis Hot Springs 4,533
30 82637 Glenrock Converse 4,425
31 82636 Evansville Natrona 4,259
32 83127 Thayne Lincoln 3,812
33 83101 Kemmerer Lincoln 3,731
34 82937 Lyman Uinta 3,542
35 82431 Lovell Big Horn 3,224
36 83014 Wilson Teton 3,098
37 82721 Moorcroft Crook 2,955
38 82426 Greybull Big Horn 2,941
39 83113 Big Piney Sublette 2,431
40 82729 Sundance Crook 2,331
41 82331 Saratoga Carbon 2,250
42 82644 Mills Natrona 2,098
43 82727 Rozet Campbell 2,040
44 83128 Alpine Lincoln 2,033
45 82410 Basin Big Horn 1,938
46 82082 Pine Bluffs Laramie 1,891
47 82732 Wright Campbell 1,671
48 82839 Ranchester Sheridan 1,661
49 82053 Burns Laramie 1,656
50 82513 Dubois Fremont 1,627

Showing the top 50 of 179 ZIP codes in Wyoming that have this figure . 82001 ranks 1st at 38,168, against 1,627 in 50th place.

Other rankings for Wyoming

Cite this page

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

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