Cass County ZIP Codes
Iowa, United States · 8 codes
Cass County in Iowa has 8 ZIP codes, from 50020 to 51552, serving 8 places.
ZIP codes in Cass
Frequently asked questions
What is the ZIP code of Cass?
Cass has 8 ZIP codes, from 50020 to 51552. The table lists the places each one serves.
How many places are listed in Cass County?
8 places.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.