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/OLDEST

ZIP Codes With the Oldest Population in Colorado

What this measures. Median age of residents, ACS 5-year estimate. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 81081 Trinchera Las Animas 82.1
2 81411 Bedrock Montrose 73.7
3 81638 Hamilton Moffat 72.7
4 81320 Cahone Dolores 71.5
5 81251 Twin Lakes Lake 71.3
6 80745 Padroni Logan 71.0
7 81020 Aguilar Las Animas 68.6
8 81055 La Veta Huerfano 68.5
9 81330 Mesa Verde National Park Montezuma 68.4
10 80426 Burns Eagle 67.5
11 80827 Lake George Park 67.3
12 81429 Paradox Montrose 66.8
13 81243 Powderhorn Gunnison 66.5
14 80463 Mc Coy Routt 65.9
15 80823 Karval Lincoln 65.8
16 81021 Arlington Kiowa 65.8
17 81128 Chromo Archuleta 65.7
18 81523 Glade Park Mesa 65.5
19 81040 Gardner Huerfano 65.4
20 80449 Hartsel Park 65.2
21 80830 Matheson Elbert 64.9
22 81131 Crestone Saguache 64.9
23 81084 Two Buttes Baca 64.3
24 81059 Model Las Animas 64.1
25 81325 Egnar Dolores 63.9
26 80820 Guffey Park 63.8
27 81155 Villa Grove Saguache 63.6
28 81019 Colorado City Pueblo 63.2
29 80482 Winter Park Grand 63.1
30 80456 Jefferson Park 62.8
31 80729 Grover Weld 62.3
32 80750 Snyder Morgan 61.8
33 80649 Orchard Weld 61.7
34 81237 Ohio City Gunnison 61.7
35 80860 Victor Teller 61.5
36 81030 Cheraw Otero 61.5
37 81410 Austin Delta 61.2
38 81241 Pitkin Gunnison 60.6
39 80742 New Raymer Weld 60.5
40 81223 Cotopaxi Fremont 59.6
41 80436 Dumont Clear Creek 59.5
42 80545 Red Feather Lakes Larimer 59.4
43 81615 Snowmass Village Pitkin 59.0
44 81043 Hartman Prowers 58.8
45 80478 Tabernash Grand 58.7
46 80809 Cascade El Paso 58.7
47 81252 Westcliffe Custer 58.7
48 81415 Crawford Montrose 58.5
49 81133 Fort Garland Costilla 58.4
50 81413 Cedaredge Delta 58.2

Showing the top 50 of 505 ZIP codes in Colorado that have this figure . 81081 ranks 1st at 82.1, against 58.2 in 50th place.

Other rankings for Colorado

Cite this page

zipcodes.pro. “ZIP Codes With the Oldest Population in Colorado.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/co/oldest

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