These Records document the activities of the American Civil Liberties Union (ACLU) in protecting individual rights between 1947 and 1995. The collection contains correspondence, clippings, court documents, memoranda, printed matter, minutes, reports, briefs, legal files, exhibit materials, and audio-visual materials. Also included are materials from ACLU affiliate organizations, the Lawyers Constitutional Defense Committee and national office legal department records (1945-1960).

Due to the exceptionally large volume within the ACLU Records, succinct series and subseries descriptions have been written, providing a basic outline of the records available. The researcher should always consult the folder list to ascertain if the records contain a topic of interest since not all subjects are mentioned in these brief descriptions.

The researcher should also be aware that many topics may be covered in more than one series or subseries. For instance, materials concerning freedom of the press are located in both the Mass Communications and Censorship subseries. Often the series descriptions note similar materials found in other parts of this collection. Due to limitations in processing time, not every file is in exact chronological or alphabetical order.