Sioux City zipcode
| City | Sioux City |
| ZIP Code | 51109 |
| Type | Standard |
| State Code | IA |
| State | Iowa |
ZIP code of Sioux City is 51109. This place is located in Iowa state in US. To send any postal service to Sioux City, you must use 51109 zipcode.
You should avoid following 1 city name of Iowa to be used with the ZIP code 51109.
- Blvd Station, IA