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16 Calif. L. Rev. Online 1 (2025)

handle is hein.journals/callro16 and id is 1 raw text is: U.S. Immigration Enforcement Data: A Short Guide David K. Hausman* INTRODUCTION Administrative datasets on immigration enforcement-the government's own records of immigration arrests, detentions, and deportations-are increasingly central to immigration journalism, research, and litigation. Access to individual-level data (i.e. data including a row for each person or action) from Customs and Border Protection (CBP), Immigration and Customs Enforcement (ICE), and the Executive Office for Immigration Review (EOIR), has made this trend possible. Yet no central resource has posted these individual-level datasets and offered guidance on their use. This data guide announces a new open online repository for these datasets, the Deportation Data Project at UC Berkeley School of Law (deportationdata.org). In order to help users navigate this resource, this data guide, cross posted on the Deportation Data Project website, describes the background and goals of the project and then offers a brief introduction to the main datasets and their relationship to the deportation process. It also offers links to existing journalism and research drawing on these datasets, along with examples of possible new analyses that the datasets make possible. DOI: https://doi.org/10.15779/Z38P26Q55K Copyright © 2025 David K. Hausman. * Assistant Professor of Law, UC Berkeley School of Law. Many thanks to Graeme Blair, Lorena Ortega-Guerrero, Amber Qureshi, and Emily Zhang for helpful comments and suggestions. Special thanks to Angela Chung and Sean You of the California Law Review for terrific edits. Disclosure: I was an attorney at the American Civil Liberties Union Immigrants' Rights' Project from 2016 to 2019 and continue to consult and volunteer occasionally for the project. That work is unrelated to this research. 1

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