Calhoun County ZIP Codes
Iowa, United States · 10 codes
Calhoun County in Iowa has 10 ZIP codes, from 50538 to 51453, serving 10 places.
ZIP codes in Calhoun
Frequently asked questions
What is the ZIP code of Calhoun?
Calhoun has 10 ZIP codes, from 50538 to 51453. The table lists the places each one serves.
How many places are listed in Calhoun County?
10 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.