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Map of ZIP Codes in Washington Township (Dubuque County), Iowa
List of ZIP Codes in Washington Township (Dubuque County), Iowa |
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| ZIP Code | ZIP Code City Name | Population | ZIP Code Type |
| Dubuque | 13436 | Non-Unique |
| Bernard | 1456 | Non-Unique |
| La Motte | 940 | Non-Unique |
| Peosta | 3924 | Non-Unique |
| Zwingle | 782 | Non-Unique |