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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Frankfort, IL

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Counties:WILL, IL
Area Code(s):779, 815, 708
Timezone(s):Central (GMT -06:00)
City Population:17,782 (More Details)
CBSA:Chicago-Naperville-Elgin, IL-IN-WI
Congressional District(s):01, 02
Land Area:837 square miles (county)
Water Area:12 square miles (county)

1 ZIP Code

Frankfort, IL ZIP Code Boundaries

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Frankfort, IL Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Frankfort, IL Demographic Information *

Total population**17,782
Male population8,776
Female population9,006
Median age (years)40.7
White Population15,822
Black Population1,090
Indian Population25
Asian Population465
Hawaiian Population2
Hispanic Population815
Median age (Male)40.6
Median age (Female)40.8
Total households5,807
Family households (families)4,967
Average household size3.04
Average family size3.32
Total housing units6,070
* Demographic data is based on 2010 Census for the City of FRANKFORT.
** 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],