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Illinois ZIP codes

Illinois has 1,575 ZIP codes (60001–62999) across 1,286 cities and towns and 102 counties.

ZIP codes
1,575
With delivery area
1,396
Population in ZIPs
12,694,745
Cities & towns
1,286
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Richest ZIP codes in Illinois Most expensive ZIP codes

Zoom in to see ZIP code boundaries. Click a dot to open a ZIP code, or anywhere else to see which ZIP it's in.

Largest cities in Illinois

Illinois ZIP codes by county

Most populated Illinois ZIP codes

  1. 60629 Chicago – 108,324
  2. 60618 Chicago – 91,901
  3. 60632 Chicago – 89,107
  4. 60647 Chicago – 84,749
  5. 60639 Chicago – 84,240
  6. 60804 Cicero – 82,797
  7. 60623 Chicago – 81,277
  8. 60608 Chicago – 80,737
  9. 60625 Chicago – 76,760
  10. 60617 Chicago – 74,790

All Illinois cities and towns

Frequently asked questions

How many ZIP codes are in Illinois?

Illinois has 1,575 ZIP codes: 1,396 with a delivery area and 179 PO Box or single-organization ZIP codes.

What ZIP codes does Illinois use?

Illinois ZIP codes run from 60001 to 62999.

Which Illinois ZIP code has the most people?

ZIP code 60629 in Chicago has the largest population, about 108,324 residents (ACS 2020–2024).