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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Columbia, IL

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Counties:MONROE, IL
Area Code(s):618
Timezone(s):Central (GMT -06:00)
City Population:9,707 (More Details)
CBSA:St. Louis, MO-IL
Congressional District(s):12, 13
Land Area:385 square miles (county)
Water Area:13 square miles (county)

1 ZIP Code

Columbia, IL ZIP Code Boundaries

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Columbia, IL Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Columbia, IL Demographic Information *

Total population**9,707
Male population4,715
Female population4,992
Median age (years)39.6
White Population9,454
Black Population36
Indian Population12
Asian Population65
Hawaiian Population0
Hispanic Population190
Median age (Male)37.8
Median age (Female)41.3
Total households3,792
Family households (families)2,692
Average household size2.53
Average family size3.03
Total housing units3,977
* Demographic data is based on 2010 Census for the City of COLUMBIA.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  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],