Illinois ZIP Codes

ZIP records
1,396
Cities represented
1,257
Counties represented
102
Sum of listed ZIP population estimates
12,694,745

Population sum includes positive estimates in these ZIP records; it is not an official state population.

Top ZIP Codes by Population

Rank	ZIP Code	City	County	Population estimate
1	60629	Chicago	Cook	108,324
2	60618	Chicago	Cook	91,901
3	60632	Chicago	Cook	89,107
4	60647	Chicago	Cook	84,749
5	60639	Chicago	Cook	84,240
6	60804	Cicero	Cook	82,797
7	60623	Chicago	Cook	81,277
8	60608	Chicago	Cook	80,737
9	60625	Chicago	Cook	76,760
10	60617	Chicago	Cook	74,790
11	60634	Chicago	Cook	73,885
12	60085	Waukegan	Lake	72,341
13	60657	Chicago	Cook	71,904
14	60614	Chicago	Cook	70,693
15	60641	Chicago	Cook	68,894
16	60640	Chicago	Cook	65,445
17	60620	Chicago	Cook	64,871
18	60402	Berwyn	Cook	63,721
19	60651	Chicago	Cook	63,335
20	60073	Round Lake	Lake	62,868

Counties

Cities

ZIP Prefix Directory

ZIP Range Directory

ZIP range 60000-69999

Download Illinois ZIP records (CSV)

Methodology: ZIP records and place names are grouped using the source file's state, city, county, and ZIP fields. Population sums add positive ZIP-level estimates; they are not official state totals. Prefix and range links lead to directories of records sharing those ZIP patterns.