Heinz Peter Longerich (born 1955) is a German professor of history and historian.

In 2003–04, he was J.B. and Maurice Shapiro Senior Scholar in Residence at the Centre for Advanced Holocaust Studies at the United States Holocaust Memorial Museum in Washington DC, where he worked on a biography of Heinrich Himmler.

[2] Longerich was director of the Research Centre for the Holocaust and Twentieth-Century History at Royal Holloway, University of London (RHUL), where he worked alongside the late David Cesarani.

His major research interests include the history of the Weimar Republic, the Third Reich, the Second World War, the Holocaust, Heinrich Himmler, and Joseph Goebbels.

Reviewing Longerich's work, Timothy Snyder declared Holocaust "profound" and Heinrich Himmler: A Life "magnificent".