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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Dennison, IL

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Counties:CLARK, IL
Area Code(s):217, 447
Timezone(s):Central (GMT -06:00)
City Population:724 (More Details)
Congressional District(s):12, 15
Land Area:501 square miles (county)
Water Area:3 square miles (county)

1 ZIP Code

Dennison, IL ZIP Code Boundaries

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Dennison, IL Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Dennison, IL Demographic Information *

There is no Census data for the city of DENNISON, IL. We have pulled information for the ZIP Code 62423 instead.
Total population**724
Male population367
Female population357
Median age (years)41.3
White Population708
Black Population0
Indian Population2
Asian Population5
Hawaiian Population0
Hispanic Population10
Median age (Male)41.9
Median age (Female)40.5
Total households285
Family households (families)220
Average household size2.54
Average family size2.88
Total housing units324
* Demographic data is based on 2010 Census for the City of DENNISON.
** 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],