How do I find the city and county for a ZIP code?

Enter the five-digit ZIP code (a ZIP+4 works too) and choose Look up ZIP. You get the place name, state and county, the approximate center point, and nearby ZIP codes.

How do I find the ZIP codes for a city?

Choose City → ZIP codes, pick the state, type the city or town (suggestions appear as you type) and choose Find ZIP codes. Large cities have dozens of ZIP codes.

What is a ZIP+4 code?

The four digits after the hyphen narrow a ZIP code to a delivery segment such as a block face, building or PO box group. The five-digit ZIP is enough for this lookup; address verification returns the full ZIP+4.

Can a ZIP code cross county or state lines?

Yes. ZIP codes are mail delivery routes, not geographic areas, so some cover parts of two or more counties, and a few cross state lines. This lookup shows the primary county for each ZIP.

Are ZIP codes the same as Census ZCTAs?

No. ZIP Code Tabulation Areas (ZCTAs) are Census Bureau areas built to approximate ZIP codes for statistics. They are redrawn only with each census, and many PO-box-only and single-organization ZIP codes have no ZCTA.

Is this the official USPS ZIP code lookup?

No. It uses the public GeoNames postal code dataset and is not affiliated with the US Postal Service. For official address and ZIP+4 information, use the USPS website or an address verification service.

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ZIP code lookup

Find the city, state and county for any US ZIP code, or every ZIP code for a city or town. Covers the 50 states, DC, Puerto Rico, the US territories and military (APO/FPO) ZIP codes.

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How to use the ZIP code lookup

Choose a search
Look up a ZIP code to see its place, state and county, or a city to see all of its ZIP codes.
Enter the ZIP or the city
ZIP+4 codes are accepted. For cities, pick the state first; suggestions appear as you type.
Use it on a label
Check that the city and ZIP on an address agree before you buy a shipping label; a mismatch is a common cause of delays.

ZIP code terms

ZIP code: The five-digit code the US Postal Service uses to route mail to a delivery area.
ZIP+4: A five-digit ZIP plus four digits identifying a delivery segment within it.
3-digit ZIP prefix: The first three digits, which identify the sectional center facility that sorts the mail and are used to set shipping zones.
ZCTA: A Census Bureau ZIP Code Tabulation Area: a statistical approximation of a ZIP code’s area.
Unique ZIP: A ZIP code assigned to a single high-volume organization, such as a government agency or university.

ZIP code lookup FAQ

How do I find the city and county for a ZIP code?: Enter the five-digit ZIP code (a ZIP+4 works too) and choose Look up ZIP. You get the place name, state and county, the approximate center point, and nearby ZIP codes.
How do I find the ZIP codes for a city?: Choose City → ZIP codes, pick the state, type the city or town (suggestions appear as you type) and choose Find ZIP codes. Large cities have dozens of ZIP codes.
What is a ZIP+4 code?: The four digits after the hyphen narrow a ZIP code to a delivery segment such as a block face, building or PO box group. The five-digit ZIP is enough for this lookup; address verification returns the full ZIP+4.
Can a ZIP code cross county or state lines?: Yes. ZIP codes are mail delivery routes, not geographic areas, so some cover parts of two or more counties, and a few cross state lines. This lookup shows the primary county for each ZIP.
Are ZIP codes the same as Census ZCTAs?: No. ZIP Code Tabulation Areas (ZCTAs) are Census Bureau areas built to approximate ZIP codes for statistics. They are redrawn only with each census, and many PO-box-only and single-organization ZIP codes have no ZCTA.
Is this the official USPS ZIP code lookup?: No. It uses the public GeoNames postal code dataset and is not affiliated with the US Postal Service. For official address and ZIP+4 information, use the USPS website or an address verification service.

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Postal code data © GeoNames, licensed under Creative Commons Attribution 4.0. ShipWave converted it to lookup files; the data may lag recent ZIP code changes. ZIP codes are delivery routes, not boundaries; for statistical areas see the Census Bureau’s ZCTAs.

ShipWave is not affiliated with or endorsed by the United States Postal Service. ZIP Code is a trademark of the USPS.