Castalia ZIP Codes

List of Zip Codes of Castalia

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

About Castalia Iowa Zip Codes

The city of Castalia in Iowa (IA) 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 711 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 Castalia fall within county jurisdictions such as Winneshiek. Each county manages local services, land use, and administration for the areas corresponding to its ZIP Codes.

Most ZIP codes for Castalia, Iowa follow the America/Chicago time zone.