Peter Charanis (1908 – 23 March 1985), born Panagiotis Charanis (Greek: Παναγιώτης Χαρανής), was a Greek-born American scholar of Byzantium and the Voorhees Professor of History at Rutgers University. Charanis was long associated with the Dumbarton Oaks research library.
Dr. Charanis was born in Lemnos, Ottoman Greece. He immigrated to the United States as a pre-teen leaving his family in Lemnos and settling in New Jersey in 1920. He received his bachelor's degree from Rutgers and his doctorate from the University of Wisconsin–Madison, where he studied under Alexander Vasiliev. He continued his studies as a postgraduate in the University of Brussels under the eminent Byzantinist, Henri Grégoire. From 1936 to 1938, he participated in Grégoire's seminar where he met his future wife Madeleine Schiltz and befriended the likes of Nicholas Adontz and Paul Wittek. According to Charanis himself, during his stay in Brussels, he acquired a profound interest in the Armenians. That interest bore abundant fruit in various studies, notably The Armenians in the Byzantine Empire (Byzantinoslavica, 1961) and A Note on the Ethnic Origin of Emperor Maurice (Byzantion, 1965).
Charanis also spent some time at the Aristotle University of Thessaloniki in Greece, and upon his return to the United States joined the Rutgers faculty in 1938, becoming Voorhees Professor of History in 1963. At that time, Byzantine Studies was still at its infancy in the United States. Charanis persuaded the history department to begin a course in Byzantine Studies, which eventually became one of the most popular courses at Rutgers. From 1964 to 1966, he served as chairman of the university's history department. He retired in 1976.
- "An important short chronicle of the fourteenth century", Byzantion 13 (1938)
- "Byzantium, the West and the origin of the First Crusade", Byzantion 19 (1949)
- "On the Social Structure and Economic Organization of the Byzantine Empire in the Thirteenth Century and Later", Byzantinoslavica 12 (1951)
- "Ethnic Changes in the Byzantine Empire in the Seventh Century", Dumbarton Oaks Papers 13 (1959)
- Charanis, Peter (1969) . "The Byzantine Empire in the Eleventh Century". A History of the Crusades. 1 (2nd ed.). Madison: University of Wisconsin Press. pp. 177–219.
- "The Armenians in the Byzantine Empire", Byzantinoslavica 22 (1961), Repr. Lisbon, 1963, London, 1972
- "Observations on the Demography of the Byzantine Empire", XIII International Congress of Byzantine Studies, Oxford, 1966
- E. Laiou, Angeliki (1985). "Peter Charanis, 1908-1985". Dumbarton Oaks Papers. Dumbarton Oaks. 39: xiii–xv. ISSN 0070-7546.
- "Dr. Peter Charanis Dies at 76; Retired Professor at Rutgers". The New York Times. March 27, 1985. Retrieved 2007-01-10.