Saint John ZIP Codes

List of Zip Codes of Saint John

The following table lists ZIP Codes associated with Saint John, Indiana, based on ZIP Code Tabulation Area (ZCTA) data from the U.S. Census Bureau.

About Saint John Indiana Zip Codes

The city of Saint John in Indiana (IN) is served by approximately 1 ZIP Codes. These codes cover residential neighborhoods, business districts, and surrounding localities that use the city name in their mailing address.

Based on ZIP-level population estimates, the combined population covered by these ZIP Codes is around 18,509 people. Population density can vary significantly from one ZIP Code to another, reflecting the mix of dense urban blocks, commercial corridors, and lower-density residential areas.

The ZIP Codes associated with Saint John fall within county jurisdictions such as Lake. Each county manages local services, land use, and administration for the areas corresponding to its ZIP Codes.

Most ZIP codes for Saint John, Indiana follow the America/Chicago time zone.