The President's Commission on the Assassination of President Kennedy, usually called the Warren Commission after its chairman Chief Justice Earl Warren, conducted hearings in 1964 on the assassination of President Kennedy. It issued its now-famous finding that Lee Harvey Oswald, alone and unaided, killed President Kennedy in Dallas on November 22, 1963. It further found that Jack Ruby's murder of Oswald, while Oswald was in police custody, was also not part of any conspiracy.

In addition to the published 26 volumes of evidence, the released files of the Warren Commission include over 50,000 pages of numbered documents, internal memorandum, transcripts of Executive Sessions, and more. The testimony and files of the Commission serve as an important base of evidence in any understanding of the events in Dallas.