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ZIP Code Database - Facts & Stats

Data Last Updated: February 1, 2023

ZIP Codes for City of Alton, IL

Alton, IL Covers 1 ZIP Code

ZIP CodeTypeCountyPopulation
ZIP Code 62002StandardMadison32,704

Timezone(s):Central (GMT -06:00)
Counties:MADISON, IL
Population:27,865 (More Details)
Male Population:13,325
Female Population:14,540
Median Age:36
ZIP Codes:1
Area Codes:1
Total Area:741 square miles (county)
Land Area:716 square miles (county)
Water Area:25 square miles (county)

Alton, IL Demographic Information *

Total population27,865
Male population13,325
Female population14,540
Median age (years)36
White Population19,082
Black Population7,421
Indian Population63
Asian Population140
Hawaiian Population5
Hispanic Population536
Median age (Male)34.4
Median age (Female)37.6
Total households11,734
Family households (families)6,854
Average household size2.33
Average family size3
Total housing units13,266
* Demographic data is based on 2010 Census. Products


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],