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/YOUNGEST

ZIP Codes With the Youngest Population in Colorado

What this measures. Median age of residents, lowest first. Source: Census American Community Survey, data release 2026-10-12.

# ZIP City County Median age
1 81335 Yellow Jacket Montezuma 12.9
2 80755 Vernon Yuma 17.9
3 80310 Boulder Boulder 19.3
4 80840 Usaf Academy El Paso 21.0
5 80914 Colorado Springs El Paso 21.6
6 80913 Colorado Springs El Paso 21.9
7 80721 Amherst Phillips 22.1
8 80521 Fort Collins Larimer 22.9
9 80902 Colorado Springs El Paso 23.5
10 81136 Hooper Alamosa 24.2
11 80302 Boulder Boulder 24.9
12 81434 Somerset Gunnison 27.1
13 81334 Towaoc Montezuma 27.8
14 80631 Greeley Weld 28.7
15 80951 Colorado Springs El Paso 29.2
16 80303 Boulder Boulder 29.3
17 80916 Colorado Springs El Paso 29.4
18 80938 Colorado Springs El Paso 29.5
19 80925 Colorado Springs El Paso 29.6
20 80216 Denver Denver 29.8
21 80930 Colorado Springs El Paso 29.9
22 80620 Evans Weld 30.0
23 81230 Gunnison Gunnison 30.5
24 80817 Fountain El Paso 30.6
25 80019 Aurora Adams 30.7
26 80045 Aurora Adams 31.5
27 80910 Colorado Springs El Paso 31.9
28 80010 Aurora Arapahoe 32.0
29 80011 Aurora Adams 32.0
30 80103 Byers Adams 32.0
31 80543 Milliken Weld 32.0
32 80459 Kremmling Grand 32.1
33 80915 Colorado Springs El Paso 32.2
34 81146 Mosca Alamosa 32.3
35 80260 Denver Adams 32.4
36 81027 Branson Las Animas 32.4
37 80239 Denver Denver 32.5
38 80246 Denver Denver 32.5
39 81041 Granada Prowers 32.5
40 81248 Sargents Saguache 32.6
41 81650 Rifle Rio Blanco 32.6
42 80204 Denver Denver 32.7
43 80705 Log Lane Village Morgan 32.8
44 80017 Aurora Arapahoe 32.9
45 80249 Denver Denver 32.9
46 80205 Denver Denver 33.1
47 80203 Denver Denver 33.2
48 80231 Denver Denver 33.3
49 80927 Colorado Springs El Paso 33.3
50 81077 Swink Otero 33.3

Showing the top 50 of 505 ZIP codes in Colorado that have this figure . 81335 ranks 1st at 12.9, against 33.3 in 50th place.

Other rankings for Colorado

Cite this page

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

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