Is USPS ZIP Code Crosswalk data free to use?

Yes. USPS ZIP Code Crosswalk is a work of the U.S. government and is in the public domain. You can use it without a license; citing U.S. Department of Housing and Urban Development is good practice.

Who publishes USPS ZIP Code Crosswalk?

U.S. Department of Housing and Urban Development publishes it. The official page is https://www.huduser.gov/portal/datasets/usps_crosswalk.html.

How should I cite this data?

Cite the original publisher: USPS ZIP Code Crosswalk, U.S. Department of Housing and Urban Development, https://www.huduser.gov/portal/datasets/usps_crosswalk.html. If you used a DatenUS page, you can add its URL as the place you viewed it.

USPS ZIP Code Crosswalk

U.S. Department of Housing and Urban Development · Places & maps

Published by: U.S. Department of Housing and Urban Development
Status on DatenUS: Collecting soon; First load in progress
License: Public domain

What this data covers

USPS ZIP Code Crosswalk is published by U.S. Department of Housing and Urban Development. DatenUS uses it for: Which counties each ZIP code covers, for local information near you. We are adding this source. Pages that use it appear once the first load finishes.

Official source: huduser.gov

Frequently asked questions

Is USPS ZIP Code Crosswalk data free to use?: Yes. USPS ZIP Code Crosswalk is a work of the U.S. government and is in the public domain. You can use it without a license; citing U.S. Department of Housing and Urban Development is good practice.
Who publishes USPS ZIP Code Crosswalk?: U.S. Department of Housing and Urban Development publishes it. The official page is https://www.huduser.gov/portal/datasets/usps_crosswalk.html.
How should I cite this data?: Cite the original publisher: USPS ZIP Code Crosswalk, U.S. Department of Housing and Urban Development, https://www.huduser.gov/portal/datasets/usps_crosswalk.html. If you used a DatenUS page, you can add its URL as the place you viewed it.

Source: U.S. Department of Housing and Urban Development