How do I find a ZIP code by city or state?

Use our ZIP code lookup tool to search by city, state, or address and instantly view related ZIP codes.

What is a ZIP+4 code?

A ZIP+4 code adds four extra digits to a standard ZIP code to help USPS sort and deliver mail more accurately.

ZIP codes are the postal code system used in the United States. Other countries use different postal code formats.

State Guides 🗓 July 31, 2026

ZIP code data reveals crime rates, school quality, income levels, and market trends. Make smarter home-buying decisions with this framework.

State Guides 🗓 July 29, 2026

Every US state has assigned ZIP code ranges. This guide covers prefix tables, counts, and how to look up ZIP codes in all 50 states.