Sioux County ZIP Codes
Iowa, United States · 13 codes
Sioux County in Iowa has 13 ZIP codes, from 51003 to 51250, serving 13 places.
ZIP codes in Sioux
Frequently asked questions
What is the ZIP code of Sioux?
Sioux has 13 ZIP codes, from 51003 to 51250. The table lists the places each one serves.
How many places are listed in Sioux County?
13 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.