United States Zip Codes provides a free zip code map and list of zip codes by state. Find zip codes by address, zip codes by city, or zip codes by state.

For example, ZIP Code 42223 serves Fort Campbell, which spans Christian County, Kentucky, and Montgomery County, Tennessee, and ZIP Code 97635 includes portions of Lake County, Oregon, …

Explore a comprehensive list of sample US ZIP codes, complete with their associated cities and states.

Nov 28, 2014 · I needed sample ZIP codes from all 50 states, so that I could test a website feature I’ve been working on. There are many sites that allow you to look up a ZIP code by city and state, but I …

Jan 12, 2026 · The standard ZIP Code consists of five digits that identify a specific geographic delivery area. For instance, the code 90254 for Hermosa Beach indicates the West Coast region (9) and the …

Need to look up a ZIP Code™? Try the ZIP Code™ lookup tool on USPS.com. Note: The ZIP Code™ lookup tool will display the address in USPS standardized format. This may look different than the …

Discover the meaning and types of US ZIP Codes, including standard, PO Box, unique, and military formats. Learn how ZIP+4 works and explore popular examples.

Jun 11, 2025 · Discover the meaning, structure, and origin of ZIP Codes in this complete guide to postal history and mail sorting.

Standard (also known as non-unique) ZIP codes usually do not cross state lines but they do cross city and county lines. There are a couple exceptions to the state line rule: One example is ZIP code …