US location post office
Sioux City, Iowa ZIP Codes
| ZIP Code | Type | City | County | County Code |
|---|---|---|---|---|
| 51101 | Standard | Sioux City | Woodbury | 19193 |
| 51103 | Standard | Sioux City | Woodbury | 19193 |
| 51104 | Standard | Sioux City | Woodbury | 19193 |
| 51105 | Standard | Sioux City | Woodbury | 19193 |
| 51106 | Standard | Sioux City | Woodbury | 19193 |
| 51108 | Standard | Sioux City | Woodbury | 19193 |
| 51109 | Standard | Sioux City | Woodbury | 19193 |
| 51111 | Standard | Sioux City | Woodbury | 19193 |
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