skip to content
Primary navigation
Feature image for Local Update of Census Addresses (LUCA)

Local Update of Census Addresses (LUCA)

LUCA is the only opportunity offered to local governments to review the Census Bureau's residential address list.

Local government leaders:
Make sure your community gets its fair share of funding in the decade ahead!

Before 2020 Census forms appear in mailboxes, the U.S. Census Bureau needs addresses. If the Bureau doesn’t know that a new subdivision or apartment building has sprung up, residents could go uncounted. That would mean less federal and state funding for your community. And, because the decennial census is the base of your community's estimated population until the next census, a poor count in 2020 will affect your estimate for the next 10 years.

In July 2017, the Census invited local governments to register to help verify and update a database of all residential addresses through its Local Update of Census Addresses (LUCA) program. Counties, cities, townships, and tribal governments will be asked to review the Census Bureau’s address file for accuracy, and supplement it with new or overlooked addresses. This review will begin in early 2018. 

What do you need to do right now?

Please register for a LUCA Training workshop. The workshops are led by trained geographers form Census Bureau. Each session will cover definitions for housing units, group quarters, city style and non-city style addresses; developing your review strategy; setting up your materials; conducting your review; and submitting your edits.

In-person training sessions will be offered in the following locations. Click the name of the city to register.

Registration is required to attend the workshop. You may attend as few or as many sessions as you wish.


Digital materials (digital address list, shapefiles, and GUPS) will be discussed from 9:00 am to 12 noon.

Paper materials (paper address list and paper maps) will be discussed from 1:00 pm to 3:00 pm

Please click here for more information about LUCA

If you are registered to participate in the LUCA, you can begin preparing for the review now. Below are a series of training videos to help you understand and begin to prepare for LUCA. The videos are taken from a recent webinar organized by the Census Bureau’s State Data Center Network. The Census Bureau will be offering formal trainings for all registered participants beginning in January. Once a training schedule is announced, it will be posted here.

Do you have general questions about LUCA? Please send us an email:

Learn the basics:
LUCA background, what's new, preparation, and schedule

back to top