This interactive map presents CSII’s latest estimates of the size and region-of-origin composition of eligible-to-naturalize adults in the United States.

We hope this tool will be useful to activists, agencies, and civic and business leaders seeking to encourage naturalization and civic engagement – and wanting information on how to better target their efforts.



Please note: This map is best viewed in Google Chrome.

How to use the map:

There are three measures the can be mapped by clicking on the check boxes above the map legend:

  • “Total number” is the default setting and maps where the greatest number of eligible-to-naturalize adults are located;
  • “As % of adults” maps eligible-to-naturalize adults as a share of all adults, to give a sense of concentration; and
  • “As % increase in CVAP, if naturalized” maps eligible-to-naturalize adults divided by the Citizen Voting Age Population (CVAP) to give a sense of the maximum percentage by which the eligible-to-naturalize adults could increase the voting-eligible population if they all naturalized.

In addition, the map can be displayed at four different geographies by clicking on the check boxes beneath the map legend: Public Use Microdata Areas (PUMAs), countiesmetropolitan (metroareas, and states.

Launch Presentation

Thank you to the 220+ participants nationwide who signed up for our March 8th webinar to launch CSII’s interactive map with the National Partnership for New Americans and Cities for Citizenship.

Download webinar handouts (PDF)


The estimates presented in the map reflect an update to our original estimates, released in 2016. The updated estimates are derived following the same basic methodology described in the document linked to below, but applied to the 2016 5-year American Community Survey (ACS) microdata from IPUMS-USA (University of Minnesota,, the 2014 Survey of Income and Program Participation, and the 2016 5-year ACS summary file. The methodology involves estimating the undocumented population in the ACS, and assuming that the bulk of the remainder of non-citizen foreign-born residents are Lawful Permanent Residents (LPRs). Criteria are then applied to that group to determine LPRs eligible to naturalize.


Download the detailed methodology (PDF)

Download the underlying map data (XLSX)


For CSII’s updated maps on the eligible-to-naturalize adult populations by probability of naturalizing see our other interactive maps:

PUMA level map 2018

State level map 2018

Congressional district map 2018

The map includes a table of each population’s demographic information, including age, race, education attainment, poverty status, English speaking ability, top five places of origin, and top five languages spoken at home (other than or in addition to English)