Census LUCA Program, 2018This page contains information, data resources, tips, etc. for Utah participants in the US Census Bureau’s Local Update of Census Addresses (LUCA) program.



The Census Bureau’s Local Update of Census Addresses (LUCA) program allows city, county, and state government to review and suggest edits to the master residential address list that Census uses to plan and execute their survey work. Of particular importance is the ability for Census to track responses across multiple survey mechanisms (field workers, survey-by-mail, and, this year, online response).

While LUCA participation is optional, many cities and counties plan to participate in the address list review. The closer the Census Bureau’s master database matches the actual addresses on the ground in your community, the better shot you’ve got to be fully counted.

Why? Here’s the big reason to for state and local government to participate in LUCA: Nationally, over $675 billion is distributed annually, using census data as part of the formula, from the federal level back to state and local government. Utah’s annual share alone was $3.25 billion in 2015. Getting Census positioned – with a complete address list – to make a full count of Utah residents helps ensure Utah gets back a proper share or what it pays in.

The decision to participate in the LUCA review is made by your highest elected official (Mayor, Commissioner, etc.) and the registration deadline is December 15th, 2017. The 120 day LUCA review time frame will begin for each jurisdiction in or after February 2018.

While limited paper and spreadsheet review options exist, the main vehicle for the LUCA review is via a GIS platform. To review and edit the address list, LUCA participants can use either the QGIS-based application Census provides (called GUPS), or other GIS software, such as ArcGIS Desktop or ArcGIS Pro, that will produce an output shapefile that adheres to the rigid data content/formal specification for LUCA.


Census LUCA and other Master Address File programs schedule

  • December 15, 2017. Deadline for counties and cities to register to participate in LUCA address review. (see Registration section of this page for instructions)
  • February 2018. LUCA review process begins. Participants will each be assigned a 120 day review window that starts upon receipt of their jurisdictions address file from Census.
  • Summer 2019. Feedback received back from LUCA program.
  • *_Late 2019_.* Census Bureau targeted address canvassing field work begins.
  • Summer 2019 - Spring 2020. Census Bureau New Construction address program in operation.
  • April 1, 2020. Census Day.

Other: In addition to the LUCA program, Census will operate a new construction program, coordinate with USPS to receive new ‘street delivery’ mail addresses, and will conduct targeted ‘address canvasing’ field work.

Contacts And Coordination

Prepping for LUCA Review

Our primary recommendation is for cities and counties to collaborate to improve their own address lists (and GIS coordinates for address locations) prior to embarking on the LUCA review. See Prioritizing and Process Design discussions below.


LUCA is all about improving the Census Bureau’s master address file. But, given the state has over 1.1 million addresses and the LUCA review window is 120 days long, reviewing every address would entail reviewing 10,000 addresses per day during that period. The Census master address file contains, in theory, all of the addresses successfully surveyed during the 2010 census. Additionally, Census has stated that their partnership with the US Postal Service means that they have all of the locations that currently receive street delivery style mail (think traditional mailboxes filled daily by a letter carrier).

For these reasons, we encourage participants to focus on these types of addresses.

  • Addressed residential structures without traditional street deliver mail (to a mailbox at/near the entrance to a structure)
  • SubAddress locations, with unit numbers (apartments, trailer courts, etc)
  • Addressed structures within gated communities and other areas with clustered mailboxes
  • Redeveloped areas where new/infill housing has been added, densified, or existing housing has been converted to non-residential
  • Group Quarters (dorms, group homes, homeless housing, assisted living facilities, etc)
  • Unaddressed residential structures likely to have a permanent occupant on April 1, 2020

Security and Process Design

One of the keys to understanding the LUCA process, and to keeping your organization out of trouble, is to remember that, within LUCA, data can only flow one way – to the Census Bureau.

This means you must keep the master address file provided by Census for your jurisdiction confidential. You may not use the Census master address file to improve your own address data resources in any way.

And, for these reasons, you should design your process to improve your local address data first, ideally in GIS format. Then, when you’re done creating and improving your own data, start the comparison and submission process that is specific to LUCA. Address data created outside of the LUCA review has fantastically broad benefit. But, if you create an address point within LUCA, it can only be used by the Census Bureau.

Data Resources

Address Count Comparison Example - click to enlargeStatewide GIS Data Resources for the LUCA process

  • Census Address Count Block File. UGRC has prepared this dataset per Census directions as a statewide shapefile or file geodatabase download or it can be used via an SDE connection (SGID10.Location.LUCABlockAddressCounts2017). An additional field has been added that contains the count of records in the current version of the SGID10.Location.AddressPoints statewide address map layer compiled from county address authorities.
  • Roads Missing from Census TIGER. Available February 2018, this file will contain a statewide collection of road centerline segments missing from the Census LUCA data files. In its instructions at the Utah LUCA training, Census indicated that LUCA participants can submit missing road segments but encouraged everyone to focus on missing addresses or address corrections. As soon as UGRC receives the statewide LUCA files, we will use a change detection algorithm to identify missing roads statewide and these will be part of the Utah state-level LUCA submission. Since the LUCA roads layer is not protected Title 13 data, we will make the missing roads layer available for download and local jurisdictions can concentrate on addressing and any other missing roads (if desired).
  • State-level address lists. TBD UGRC plans to contact state agency programs with address lists that may be valuable to the LUCA process, to explore data sharing. Potential data partners may include the Driver’s License, Motor Vehicle Registration, and the Tax Commission. Ensuring confidentiality is expected to be critical in any use of these address resources.
  • Utah-specific Address Geocoding Tools Webpage allow users to geocode against Utah road centerlines or address points via the Web API or an ArcMap Add-in.
  • The LUCA data that will be provided to participants will reflect municipal and county boundaries that UGRC submitted to Census BAS boundary survey in spring of 2017. For this reason, addresses within annexations that took place after the UGRC’s BAS submission will not appear in the address lists that cities receive.
  • UGRC will, periodically in the build up to the 2020 census, be providing Census with Utah’s official municipal boundaries. All annexations of cities and counties that are certified by the Lt. Governor are kept in the SGID.Boundaries.Municipalities layer. UGRC extends an open invitation to review these boundaries for accuracy at anytime. Comments, questions, compliments, or concerns can be directed to Mike Heagin from UGRC at MHeagin@utah.gov or 385-401-9667.

Reference Materials