Volume IV of the Warren Commission Hearings and Exhibits volumes is one of 5 volumes of testimony taken by the Commission members in Washington DC. There are 10 additional volumes of testimony and affidavits taken by staff members in various locations, and 11 volumes of Exhibits.

Volume IV consists of testimony from fingerprint experts and other expert witnesses, physicians from Parkland Hospital involved in the treatment of Governor Connally's wounds, Texas Governor Connally himself and his wife, Dallas Police officers, Secret Service representatives, FBI agents who dealt with Oswald prior to the assassination, and others. The testimony in this volume was conducted between April 2 and May 5, 1964.