09/02/2026
Incarcerated men at Alcatraz were allowed to send two letters a week and receive up to seven. All mail going in and out of Alcatraz was read and censored by the administrative staff and each person had to get their list of correspondents approved by the Warden. They could not write about other inmates or events that happened at Alcatraz.
Alcatraz also had a “prisoner’s mail box,” which allowed an incarcerated person to write a letter of grievance directly to a Department of Justice official, without the letter being inspected or censored by the Warden. For instance, they could write to the Director of the Bureau of Prisons, the Attorney General, the Parole Board, or Federal judges. It was an important first step in the evolution of inmate rights in federal prisons.
Today, thousands of letters and documents are preserved at the National Archives and Records Administration in San Bruno, California. This office holds the federal records for Alcatraz, including files related to the over 1,500 inmates who were imprisoned on the island. It’s a treasure trove of information for researchers, writers, and park staff. We frequently visit the archives to read through these original letters and documents, then return to the island to incorporate this knowledge into our tours and exhibits.
Thank you to our friends at the archives! The access you provide to these documents help us tell the history of the island to over 1.4 million visitors a year.
National Archives at San Francisco
📷Alcatraz Island staff looking through historic documents in the research room at the National Archives.
📷Letter from the files of Harold Swann (AZ 1289), scanned during a recent trip to the archives. In this letter, Swann’s mother writes to the Warden asking for an update on her son.