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/CO/LARGEST-AREA

Largest ZIP Codes in Colorado 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 81640 Maybell Moffat 2,226.69 sq mi
2 81641 Meeker Rio Blanco 1,811.18 sq mi
3 81230 Gunnison Gunnison 1,696.94 sq mi
4 81625 Craig Moffat 1,507.45 sq mi
5 80480 Walden Jackson 1,361.90 sq mi
6 81147 Pagosa Springs Archuleta 1,355.47 sq mi
7 81630 De Beque Garfield 1,256.58 sq mi
8 81648 Rangely Rio Blanco 1,085.67 sq mi
9 81059 Model Las Animas 1,026.17 sq mi
10 81650 Rifle Rio Blanco 1,022.70 sq mi
11 81049 Kim Las Animas 1,015.08 sq mi
12 80720 Akron Washington 986.64 sq mi
13 81130 Creede Mineral 974.76 sq mi
14 81054 Las Animas Bent 943.74 sq mi
15 81089 Walsenburg Huerfano 940.39 sq mi
16 81120 Antonito Conejos 893.53 sq mi
17 81527 Whitewater Mesa 841.92 sq mi
18 80487 Steamboat Springs Routt 795.80 sq mi
19 81637 Gypsum Garfield 787.28 sq mi
20 81082 Trinidad Las Animas 768.24 sq mi
21 80821 Hugo Lincoln 755.93 sq mi
22 81301 Durango La Plata 755.41 sq mi
23 81323 Dolores Dolores 755.03 sq mi
24 80807 Burlington Kit Carson 743.93 sq mi
25 81036 Eads Kiowa 737.23 sq mi
26 81132 Del Norte Rio Grande 701.65 sq mi
27 80758 Wray Yuma 683.53 sq mi
28 81027 Branson Las Animas 679.44 sq mi
29 81052 Lamar Prowers 675.41 sq mi
30 81212 Canon City Fremont 672.00 sq mi
31 81149 Saguache Saguache 661.26 sq mi
32 81090 Walsh Baca 652.90 sq mi
33 81073 Springfield Baca 639.34 sq mi
34 80759 Yuma Yuma 633.67 sq mi
35 81434 Somerset Gunnison 620.19 sq mi
36 80701 Fort Morgan Morgan 616.51 sq mi
37 81252 Westcliffe Custer 612.95 sq mi
38 80459 Kremmling Grand 607.89 sq mi
39 81047 Holly Prowers 604.11 sq mi
40 80729 Grover Weld 592.82 sq mi
41 81423 Norwood San Miguel 588.81 sq mi
42 81039 Fowler Pueblo 588.58 sq mi
43 81416 Delta Delta 570.61 sq mi
44 81029 Campo Baca 570.26 sq mi
45 80810 Cheyenne Wells Cheyenne 569.15 sq mi
46 81071 Sheridan Lake Kiowa 568.03 sq mi
47 80825 Kit Carson Cheyenne 561.18 sq mi
48 81025 Boone Pueblo 549.62 sq mi
49 81624 Collbran Mesa 548.83 sq mi
50 81235 Lake City Hinsdale 534.61 sq mi

Showing the top 50 of 527 ZIP codes in Colorado that have this figure and meet the threshold above. 81640 ranks 1st at 2,226.69 sq mi, against 534.61 sq mi in 50th place.

Other rankings for Colorado

Cite this page

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

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