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/IL/YOUNGEST

ZIP Codes With the Youngest Population in Illinois

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 62359 Paloma Adams 4.9
2 61750 Lane De Witt 10.5
3 60932 East Lynn Vermilion 14.9
4 62030 Fidelity Jersey 15.9
5 62850 Johnsonville Wayne 16.5
6 61057 Nachusa Lee 17.8
7 61478 Smithshire Warren 17.9
8 62026 Edwardsville Madison 19.0
9 61625 Peoria Peoria 19.7
10 61091 Woosung Ogle 20.0
11 60208 Evanston Cook 20.4
12 60088 Great Lakes Lake 21.1
13 62028 Elsah Jersey 21.8
14 61820 Champaign Champaign 21.9
15 62943 Grantsburg Johnson 22.2
16 60539 Mooseheart Kane 23.2
17 61606 Peoria Peoria 23.4
18 62942 Grand Tower Jackson 23.8
19 62940 Gorham Jackson 23.9
20 61801 Urbana Champaign 24.2
21 62903 Carbondale Jackson 24.6
22 62256 Maeystown Monroe 24.9
23 61761 Normal McLean 25.1
24 62901 Carbondale Jackson 25.2
25 61435 Gerlaw Warren 25.8
26 62225 Scott Air Force Base St. Clair 25.8
27 60115 Dekalb DeKalb 26.4
28 62897 Whittington Franklin 26.6
29 60933 Elliott Ford 27.3
30 60602 Chicago Cook 28.0
31 60973 Wellington Iroquois 28.0
32 62570 Tovey Christian 28.2
33 62361 Pearl Pike 28.3
34 60129 Esmond Ogle 28.8
35 60165 Stone Park Cook 28.9
36 60064 North Chicago Lake 29.1
37 61936 La Place Piatt 29.1
38 62537 Harristown Macon 29.3
39 62459 Sainte Marie Jasper 29.4
40 62059 Lovejoy St. Clair 29.5
41 62541 Lake Fork Logan 29.5
42 60949 Ludlow Champaign 29.7
43 61378 West Brooklyn Lee 29.8
44 61426 Castleton Stark 29.8
45 62469 Trilla Cumberland 29.8
46 60556 Waterman DeKalb 30.0
47 61875 Seymour Champaign 30.1
48 62240 East Carondelet St. Clair 30.1
49 62815 Bone Gap Edwards 30.2
50 60183 Wasco Kane 30.3

Showing the top 50 of 1,384 ZIP codes in Illinois that have this figure . 62359 ranks 1st at 4.9, against 30.3 in 50th place.

Other rankings for Illinois

Cite this page

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

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