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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Sandwich, IL

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Counties:DEKALB, IL
Area Code(s):779, 815
Timezone(s):Central (GMT -06:00)
City Population:7,421 (More Details)
CBSA:Chicago-Naperville-Elgin, IL-IN-WI
Congressional District(s):14
Land Area:631 square miles (county)
Water Area:3 square miles (county)

1 ZIP Code

Sandwich, IL ZIP Code Boundaries

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Sandwich, IL Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases

Sandwich, IL Demographic Information *

Total population**7,421
Male population3,713
Female population3,708
Median age (years)37.3
White Population6,745
Black Population35
Indian Population17
Asian Population56
Hawaiian Population0
Hispanic Population935
Median age (Male)35
Median age (Female)39.1
Total households2,704
Family households (families)1,895
Average household size2.69
Average family size3.21
Total housing units2,876
* Demographic data is based on 2010 Census for the City of SANDWICH.
** 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],