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ZIP Code Database - Facts & Stats

Data Last Updated: June 1, 2023

ZIP Codes for City of Saint John, IN

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Counties:LAKE, IN
Area Code(s):219
Timezone(s):Central (GMT -06:00)
City Population:14,850 (More Details)
CBSA:Chicago-Naperville-Elgin, IL-IN-WI
Congressional District(s):01
Land Area:499 square miles (county)
Water Area:128 square miles (county)

1 ZIP Code

Saint John, IN ZIP Code Boundaries

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Saint John, IN Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
46373Standard13,859100.00%ST JOHN

Saint John, IN Demographic Information *

Total population**14,850
Male population7,410
Female population7,440
Median age (years)40.2
White Population13,892
Black Population199
Indian Population19
Asian Population187
Hawaiian Population10
Hispanic Population1,222
Median age (Male)39.6
Median age (Female)40.9
Total households5,047
Family households (families)4,225
Average household size2.94
Average family size3.25
Total housing units5,201
* Demographic data is based on 2010 Census for the City of SAINT JOHN.
** 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],