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/SMALLEST-AREA

Smallest ZIP Codes in Wyoming by Land Area

What this measures. Land area of the Census tabulation area, smallest first. These are almost always dense urban ZIP codes covering a few city blocks. Source: Census Gazetteer, data release 2026-10-12.

# ZIP City County Land area
1 82440 Ralston Park 0.64 sq mi
2 82644 Mills Natrona 0.81 sq mi
3 82218 Huntley Goshen 1.02 sq mi
4 82005 Fe Warren Afb Laramie 2.59 sq mi
5 83116 Diamondville Lincoln 2.89 sq mi
6 83121 Frontier Lincoln 2.91 sq mi
7 82929 Little America Sweetwater 3.15 sq mi
8 82430 Kirby Hot Springs 3.75 sq mi
9 82322 Bairoil Sweetwater 5.27 sq mi
10 82635 Edgerton Natrona 7.02 sq mi
11 82934 Granger Sweetwater 7.19 sq mi
12 83122 Grover Lincoln 7.43 sq mi
13 82515 Hudson Fremont 8.78 sq mi
14 82842 Story Sheridan 9.02 sq mi
15 82942 Point Of Rocks Sweetwater 9.85 sq mi
16 82073 Laramie Albany 10.28 sq mi
17 82422 Emblem Big Horn 10.88 sq mi
18 83126 Smoot Lincoln 11.49 sq mi
19 82335 Walcott Carbon 12.04 sq mi
20 82423 Frannie Big Horn 12.37 sq mi
21 83119 Fairview Lincoln 13.28 sq mi
22 82412 Byron Big Horn 13.31 sq mi
23 83025 Teton Village Teton 13.89 sq mi
24 82643 Midwest Natrona 14.33 sq mi
25 82837 Leiter Sheridan 14.56 sq mi
26 83111 Auburn Lincoln 15.03 sq mi
27 82323 Dixon Carbon 15.29 sq mi
28 82714 Devils Tower Crook 22.98 sq mi
29 82052 Buford Albany 23.50 sq mi
30 82640 Linch Johnson 25.52 sq mi
31 82844 Wolf Sheridan 28.92 sq mi
32 83124 Opal Lincoln 32.50 sq mi
33 82450 Wapiti Park 34.16 sq mi
34 82943 Reliance Sweetwater 39.09 sq mi
35 82060 Hillsdale Laramie 41.62 sq mi
36 83123 La Barge Lincoln 45.79 sq mi
37 82434 Otto Big Horn 49.65 sq mi
38 82243 Veteran Goshen 50.30 sq mi
39 82310 Jeffrey City Fremont 50.86 sq mi
40 82646 Natrona Natrona 51.50 sq mi
41 82420 Cowley Big Horn 53.23 sq mi
42 82001 Cheyenne Laramie 55.10 sq mi
43 83112 Bedford Lincoln 57.05 sq mi
44 82055 Centennial Albany 58.03 sq mi
45 82215 Hartville Platte 60.83 sq mi
46 82510 Arapahoe Fremont 63.92 sq mi
47 82609 Casper Natrona 65.20 sq mi
48 82945 Superior Sweetwater 68.38 sq mi
49 82638 Hiland Natrona 69.13 sq mi
50 82421 Deaver Big Horn 74.33 sq mi

Showing the top 50 of 179 ZIP codes in Wyoming that have this figure and meet the threshold above. 82440 ranks 1st at 0.64 sq mi, against 74.33 sq mi in 50th place.

Other rankings for Wyoming

Cite this page

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

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