Alexander County, Illinois ZIP Codes

6 ZIP Codes

Zip Code
City
Population ↓
62914Cairo1,765
62988Tamms1,149
62990Thebes973
62957McClure640
62969Olive Branch314
62962Miller City0

Overview of ZIP Codes in Alexander County

ZCTAs are geographic areas created by the US Census Bureau to approximate the delivery areas of ZIP Codes for statistical analysis. While ZCTAs use the same five-digit codes as ZIP Codes, they represent defined geographic areas that may not exactly match the mail delivery routes of ZIP Codes.
6
ZIP Codes

The data shown reflect ZCTAs from the US Census. As of 2025, there are 6 ZCTAs in Alexander County, Illinois (US Census).

Sources

  1. US Census: 2025 Gazetteer Files
  2. US Census: ZIP Code Tabulation Areas (ZCTAs)

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