The foundation of every census is a comprehensive address list. If a housing unit isn’t on the Census Bureau’s list, the people residing there are likely to be left out of the census altogether. That’s why the Local Update of Census Addresses (LUCA) operation is the first to occur in every decennial census cycle.

This resource guide, developed by the 2030 Census National LUCA Working Group, serves as a starting point to help community stakeholders learn about and prepare for the LUCA operation.