Keystone ZIP Codes

List of Zip Codes of Keystone

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

About Keystone Indiana Zip Codes

The city of Keystone 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 381 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 Keystone fall within county jurisdictions such as Wells. Each county manages local services, land use, and administration for the areas corresponding to its ZIP Codes.

Most ZIP codes for Keystone, Indiana follow the America/Indiana/Indianapolis time zone.