Random ZIP Code Generator (US)

Generate random US ZIP codes, optionally filtered to a specific state. Uses real USPS prefix ranges so the codes are geographically plausible. ZIP+4 supported.

Generators

State

Count 20

ZIP+4 (full 9-digit format)

ZIP codes

Common use cases

Generate test addresses for app development
Seed location data for demos
Validate forms that check ZIP-state correlation
Create realistic mock CSVs

Frequently asked questions

Are these valid ZIP codes?

They use real USPS first-3-digit prefix ranges per state, so they fall within delivery regions. The last 2 digits are random and may not correspond to an actual delivery point.

What is ZIP+4?

The full 9-digit USPS code: 5-digit ZIP plus 4 digits identifying a specific delivery segment (a building, floor, or PO box cluster). Used in addressing for higher precision.

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