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/OLDEST

ZIP Codes With the Oldest Population in Illinois

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 62843 Golden Gate Wayne 86.8
2 61112 Rockford Winnebago 80.4
3 61562 Rome Peoria 77.4
4 61751 Lawndale Logan 75.3
5 61374 Van Orin Bureau 73.4
6 62261 Modoc Randolph 72.1
7 61346 New Bedford Bureau 71.5
8 62344 Huntsville Schuyler 70.3
9 60141 Hines Cook 70.2
10 61037 Galt Whiteside 69.3
11 62532 Elwin Macon 67.4
12 61311 Ancona Livingston 65.9
13 62967 New Burnside Johnson 65.4
14 61274 Osco Henry 65.3
15 61276 Preemption Mercer 65.2
16 61552 Mossville Peoria 64.5
17 62639 Frederick Schuyler 64.2
18 62297 Walsh Randolph 63.5
19 61007 Baileyville Ogle 63.1
20 61560 Putnam Putnam 62.9
21 62954 Junction Gallatin 62.3
22 61872 Sadorus Champaign 62.1
23 62346 La Prairie Adams 62.1
24 61855 Milmine Piatt 62.0
25 62434 Ingraham Clay 61.6
26 61743 Graymont Livingston 61.5
27 62820 Burnt Prairie White 61.5
28 62474 Westfield Clark 61.3
29 62319 Camden Schuyler 60.8
30 61831 Collison Vermilion 60.7
31 62076 Ohlman Montgomery 60.7
32 61067 Ridott Stephenson 60.5
33 62019 Donnellson Bond 60.5
34 62928 Eddyville Pope 60.5
35 61524 Dunfermline Fulton 60.1
36 61261 Lyndon Whiteside 60.0
37 62336 Ferris Hancock 60.0
38 62947 Herod Pope 60.0
39 61313 Blackstone Livingston 59.9
40 61323 Dover Bureau 59.6
41 61850 Indianola Vermilion 59.6
42 62266 New Memphis Clinton 59.6
43 61436 Gilson Knox 59.5
44 61043 Holcomb Ogle 59.3
45 62085 Sawyerville Macoupin 59.3
46 62965 Muddy Saline 59.2
47 62817 Broughton Hamilton 59.0
48 61840 Dewey Champaign 58.9
49 61036 Galena Jo Daviess 58.8
50 61469 Oquawka Henderson 58.6

Showing the top 50 of 1,384 ZIP codes in Illinois that have this figure . 62843 ranks 1st at 86.8, against 58.6 in 50th place.

Other rankings for Illinois

Cite this page

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

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