ZIP to State Lookup
Enter any 5-digit ZIP code to identify the US State instantly.
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How to use this tool?
- Enter a valid 5-digit US ZIP Code.
- Click the "Find State" button.
- The tool will display the full State Name and Abbreviation (e.g., CA).
- Works for all 50 States, Puerto Rico, and DC.
Why use ZIP to State?
- ✓ Shipping: Verify correct state destination.
- ✓ Sales Tax: Determine state tax nexus.
- ✓ Data Cleaning: Fix incomplete address lists.
Frequently Asked Questions
Do ZIP codes ever cross state lines?
Yes, mostly along borders. However, ZIP codes generally belong to one primary state for mail delivery purposes. Our tool shows the primary state.
Does this work for PO Boxes?
Yes, PO Box ZIP codes are assigned to specific post offices within a specific state.