Chicago, Illinois
- ZIP codes
- 84
- County associations
- 1
Overview
Chicago sits on the southwestern shore of Lake Michigan, where the Chicago River threads through downtown. The lakefront, elevated trains and skyline give the city a recognizable form, while its neighborhoods extend well beyond the central business district.
Population overview
- Census population count
- 2,746,388
- Reference year
- 2020
Population of the matched statistical area, not a ZIP delivery area.
Map & location
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Dots summarize approximate ZIP locations grouped by state and three-digit prefix; they are not official delivery boundaries. Colors follow the first digit. Not every number in a displayed range is assigned. Alaska and island insets are relocated and use different scales.
Locations use available coordinates, not delivery boundaries. The simplified world outline may omit small islands; postal associations do not imply administrative ownership.
County outlines are simplified 2017 Census reference geography, not current legal or ZIP delivery boundaries. Highlighting follows postal associations.
No reliable coordinates are available for this postal region.
ZIP directory
Page 1 / 2Postal details & data notes
ZIP codes organize mail delivery, not administrative boundaries. A code can have several city or county associations. Coordinates are approximate; verify delivery addresses with your carrier. Read the guide ↗