Illegal aliens (Library of Congress Subject Heading)

Illegal aliens was a topical subject term in the Library of Congress Subject Headings thesaurus, a phrase assigned by librarians to describe the content of resources in a library catalog relating to undocumented immigration. The subject heading became a topic of political interest in the United States in 2016, when a decision by the Library of Congress to revise the heading and replace it with the terms Noncitizens and Unauthorized immigration was opposed by congressional Republicans. In 2021, the Illegal aliens subject headings were replaced with two headings, Noncitizens and Illegal immigration.

Background
The subject heading Aliens, Illegal was established by the Library of Congress in 1980 and revised to Illegal aliens in 1993.

The subject heading incorporates references from non-preferred forms of the term including Aliens--Legal status, laws, etc.; Aliens, Illegal; Illegal aliens--Legal status, laws, etc.; Illegal immigrants; Illegal immigration; and Undocumented aliens. It also references related terms such as Alien detention centers and Human smuggling. Associated headings include Children of illegal aliens and Women illegal aliens.

Calls for different wording
In 2010, racial justice organization Race Forward debuted a campaign to "Drop the I-Word," an effort to ask media sources to no longer use the word "illegal" when referring to undocumented immigrants, arguing that using the word to describe people was dehumanizing, racially charged, and legally inaccurate. Multiple news outlets stopped using "illegal" to describe people in the early 2010s, including the Associated Press.

Student activists at Dartmouth College, including the Dartmouth Coalition for Immigration Reform, Equality and DREAMERs (CoFIRED), issued a series of racial justice demands to the Dartmouth administration in February 2014, one of which requested the term Illegal aliens not be used in the library's catalog. Together with Dartmouth librarians, the students from CoFIRED submitted a formal request to the Library of Congress in the summer of 2014 for the heading to be revised to Undocumented immigrants. In February 2015, the Library of Congress announced it would not change the heading, in part because resources such as Black's Law Dictionary used "Illegal aliens" as an established term.

Librarian activists continued to gather support to ask for the heading's revision. The Council of the American Library Association passed a resolution in January 2016 calling the term "dehumanizing, offensive, inflammatory, and even a racial slur" and urging the Library of Congress to change the subject heading to Undocumented immigrants.

2016 announcement and subsequent developments
In March 2016, the Library of Congress announced that it would replace the heading with two new headings: Noncitizens and Unauthorized immigration. Following the announcement, Republican lawmakers made multiple attempts to block the revision of the subject heading, including the introduction of a bill by U.S. Representative Diane Black requiring the Library to retain the heading. In June 2016, the House of Representatives added a provision to the 2017 appropriations bill for the legislative branch requiring the Library of Congress to retain the heading without revision. While the final bill did not require LC to keep the "Illegal aliens" wording, LC was required "to make publicly available its process for changing or adding subject headings."

The 2019 documentary film Change the Subject, about the students at Dartmouth College, was screened throughout the U.S.

Over forty libraries and library systems revised the heading in their local catalogs.

2021 revision
On November 12, 2021, the Library of Congress Policy and Standards Division announced they would replace the term Aliens with Noncitizens and the term Illegal aliens with Illegal immigration. That change was implemented in December 2021. Reactions to the chosen terms were mixed, with a letter signed by Senators Ted Cruz and Mike Braun calling the decision "a politically-motivated and Orwellian attempt to manipulate and control language," while some librarians expressed frustrations that the changed language remains dehumanizing.