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/LOWEST-AVERAGE-INCOME

ZIP Codes With the Lowest Average Income in Illinois

What this measures. Total adjusted gross income divided by tax returns filed, lowest first. ZIP codes with fewer than 200 returns are excluded: the IRS suppresses small cells and the remainder swing too wildly to rank. Source: IRS Statistics of Income, ZIP code data, data release 2026-10-12.

# ZIP City County Average AGI per return
1 62204 East Saint Louis St. Clair $27,690
2 61605 Peoria Peoria $29,662
3 62207 East Saint Louis St. Clair $31,538
4 60621 Chicago Cook $32,111
5 61104 Rockford Winnebago $33,049
6 62090 Venice Madison $33,111
7 62206 East Saint Louis St. Clair $33,577
8 62205 East Saint Louis St. Clair $33,666
9 60636 Chicago Cook $33,684
10 60958 Pembroke Township Kankakee $34,892
11 60472 Robbins Cook $34,954
12 60624 Chicago Cook $35,179
13 62060 Madison Madison $35,227
14 62201 East Saint Louis St. Clair $35,835
15 60644 Chicago Cook $36,546
16 62203 East Saint Louis St. Clair $36,559
17 60426 Harvey Cook $37,311
18 60827 Riverdale Cook $37,345
19 60623 Chicago Cook $38,418
20 61603 Peoria Peoria $38,446
21 62914 Cairo Alexander $39,693
22 60064 North Chicago Lake $40,037
23 60428 Markham Cook $40,702
24 60651 Chicago Cook $40,992
25 60620 Chicago Cook $41,713
26 60628 Chicago Cook $42,302
27 60639 Chicago Cook $42,660
28 62087 South Roxana Madison $42,909
29 61001 Apple River Jo Daviess $43,459
30 60165 Stone Park Cook $43,528
31 60804 Cicero Cook $43,592
32 60632 Chicago Cook $43,596
33 60409 Calumet City Cook $43,695
34 60505 Aurora Kane $43,739
35 60419 Dolton Cook $43,920
36 60153 Maywood Cook $43,927
37 62018 Cottage Hills Madison $43,969
38 61239 Carbon Cliff Rock Island $44,641
39 60629 Chicago Cook $44,641
40 61101 Rockford Winnebago $44,926
41 60484 University Park Will $45,395
42 62964 Mounds Pulaski $45,420
43 60085 Waukegan Lake $45,563
44 62999 Zeigler Franklin $45,592
45 60649 Chicago Cook $45,639
46 60501 Summit Argo Cook $45,886
47 62703 Springfield Sangamon $46,196
48 61833 Tilton Vermilion $46,198
49 60406 Blue Island Cook $46,272
50 61610 Creve Coeur Tazewell $46,571

Showing the top 50 of 1,129 ZIP codes in Illinois that have this figure and meet the threshold above. 62204 ranks 1st at $27,690, against $46,571 in 50th place.

Other rankings for Illinois

Cite this page

zipcodes.pro. “ZIP Codes With the Lowest Average Income in Illinois.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/rankings/il/lowest-average-income

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