Hans Eberhard Mayer (born 2 February 1932 in Nuremberg) is a German historian.
Hans Eberhard Mayer is an international expert on the history of the crusades. He is currently the Professor of Medieval and Modern History at the University of Kiel.
He was a member of the Monumenta Germaniae Historica between 1956 and 1967. He was a Visiting Fellow at the German Historical Institute in Rome in 1961. He was a Visiting Fellow in 1965 and Visiting Scholar in 1970 to Dumbarton Oaks in Washington DC, Lecturer at the University of Innsbruck between 1964 and 1967, Visiting Professor at Yale University in 1971, and Member of the Institute for Advanced Study in Princeton, New Jersey between 1972 and 1973.
- The Crusades (1965, in German)
- Kings and Lords in the Latin Kingdom of Jerusalem (1994)