Oto Luthar (born 11 August 1959) is a Slovenian historian. Since 1992, he has served as the director of the Research Centre of the Slovenian Academy of Sciences and Arts in Ljubljana, the largest research institution in Slovenia.
He was born in Murska Sobota, Slovenia, then part of the Socialist Federal Republic of Yugoslavia. He studied history at the University of Ljubljana, graduating under the supervision of Bogo Grafenauer in 1986. He obtained his PhD in 1992. Since 1989, he has taught history at the University of Maribor. Between 1999 and 2000, he was a visiting professor at Yale University.
He has written on numerous subjects, including the history and theory of historiography, the history of European Jews, especially their relation to Slavic peoples, and the social history of World War I. Since 2003, he has also headed the graduate program in cultural studies at the University of Nova Gorica.
In 2011, Luthar was awarded the Austrian Cross of Honour for Science and Art.
He is married to the cultural critic and sociologist Breda Luthar.
- Med kronologijo in fikcijo. Strategije zgodovinskega mišljenja ("Between Chronology and Fiction. Strategies of Historical Thinking"), Ljubljana 1993.
- Mojstri in muze: Kaj in zakaj je zgodovina ("Masters and Muses: What and Why is History"), Ljubljana 1997.
- O žalosti niti besede ("Not a Word about Sorrow"), Ljubljana 2000.
- Liberal Democracy, Citizenship & Education, Ontario 2001 (co-editor).
- Jews and Slavs, vol. 12 (editor). Jerusalem - Ljubljana 2004.
- "Reply to a parliamentary question" (pdf) (in German). p. 1977. Retrieved 9 March 2013.