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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?

Registration for the LUCA Program is closed as of December 15, 2017. The review period will begin in February 2018 and last for 120 days from the time participants receive their materials from the Census Bureau. If your county, city, township, or tribal area did not registered for the LUCA, you can still coordinate with the State of Minnesota to conduct your review. Please email for more information.

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

Check if your municipality is registered

Explore the Registered LUCA Participant map (updated weekly). Zoom in to see more detailed information.

Registration Map: December 27, 2017
LUCA map 12-27-17
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