Id.zip May 2026

Adding the extra four digits can speed up delivery.

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Use this for a more precise 9-digit code (e.g., 83702-1234). Quick Reference for Major Idaho Cities Primary ZIP Code Boise Pocatello Idaho Falls Twin Falls Coeur d'Alene Best Practices for Addressing Mail Use All Caps: The USPS prefers "ZIP Code" in uppercase. Adding the extra four digits can speed up delivery

The search result for likely refers to the Zone Improvement Plan (ZIP) Codes used specifically within the state of Idaho (ID) . Idaho ZIP Code Structure use these official resources:

If you need to look up a specific code for an address, use these official resources: