ZIP Codes and ZCTAs do not always perfectly align. To help you find the corresponding ZCTA for a given ZIP Code, we update this crosswalk annually to match patient data from the Uniform Data System. 

Below is the crosswalk to convert ZIP Codes from the Patients by ZIP Code table in the 2021 report to ZCTAs. The U.S. Census Bureau creates ZCTAs but does not release an official crosswalk between ZIP Codes and ZCTAs. ZCTAs may be comprised of one or more ZIP Codes. ZCTAs are not an exact geographic match to ZIP Codes, so we are providing this list to allow you to see where data from a certain ZIP Code will be displayed on the UDS Mapper. It is important to remember that the ZIP Code listed by a health center in their UDS report may be different from the ZCTA used on the UDS Mapper so please use this list to identify where your ZIP Code data are displayed.

*NOTE on ZCTA vintage: This version of the crosswalk uses 2019 ZCTA geographic boundaries. These are based on the Census 2010 ZCTA areas. The crosswalk is designed to support the UDS service area analysis and incorporates population, demographic and socioeconomic data from the American Community Survey (ACS) 2016-2020 5-year estimates at the ZCTA summary level. These estimates continue to use the 2010-2019 vintage boundaries for ZCTAs, therefore the crosswalk still utilizes the same boundaries. New Census 2020 geographic boundaries have been published for ZCTAs and the ACS 2017-2021 estimates are expected to be released using the new geographic boundaries.

Download the ZIP Code to ZCTA Crosswalk for the 2021 UDS report data




ZIP TypeDefinition
ZIP Code AreaZIP Code Areas are typical ZIP Codes without any special designation.
Post Office or large volume customerPost Offices or large volume customers typically occupy a very small geography and have few residential addresses located within them.

ZIP Code to ZCTA Crosswalk Table developed by John Snow, Inc. (JSI) for use with UDS Service Area data. Not an official USPS or U.S. Census Bureau product.

P.O. Box and large volume customer ZIP Codes may not correspond to residence location of census population using that ZIP Code- use with caution!

If you have any questions or concerns about this crosswalk, please Contact Us.

Past Years’ ZIP Code to ZCTA Crosswalks

For the 2020 UDS Report Data
For the 2019 UDS Report Data
For the 2018 UDS Report Data
For the 2017 UDS Report Data
For the 2016 UDS Report Data
For the 2015 UDS Report Data
For the 2014 UDS Report Data
For the 2013 UDS Report Data
For the 2012 UDS Report Data
For the 2011 UDS Report Data
For the 2010 UDS Report Data
For the 2009 UDS Report Data