Oscar Theodore Broneer (December 28, 1894 – February 22, 1992) was a prominent Swedish American educator and archaeologist known in particular for his work on Ancient Greece. He is most associated with his discovery of the Temple of Isthmia, an important Panhellenic shrine dating from the seventh century B.C. 
Broneer was born in the parish of Bäckebo in Kalmar, Sweden. Broneer was the youngest son of a rural farm family. He left Sweden in 1913 for the United States. He first studied at Augustana College and then attended the University of California, Berkeley where it took Broneer only two years to earn both an M.A. and Ph.D. Broneer was professor of archeology, classical languages and literature at the University of Chicago from 1949 until his retirement in 1960. He also served as director of the university excavations at Isthmia. Additionally he held visiting professorships at the University of California at Los Angeles and Stanford University. 
Broneer taught at the American School of Classical Studies at Athens and worked for years at the Corinth Excavations. In the late 1930s, he worked in Northern Greece and described the re-erection of the monumental Lion of Amphipolis in the book The Lion of Amphipolis published in 1941. He returned to an impoverished Greece after the end of World War II as a member of the International Red Cross. In 1947, he also directed Triumph Over Time, a documentary short film issued as a fundraiser by the American School of Classical Studies in Athens. While working at Corinth he also developed the first systematic typology of ancient terracotta lamps.   
In 1952, Broneer famously discovered the temple of Poseidon at Isthmia on the very first day of the excavation. He published his findings in a series of three volumes: Isthmia, Vol. 1, Temple of Poseidon (1971), Isthmia, Vol. 2, Topography and Architecture (1973) and Isthmia, Vol. 3, Terracotta Lamps (1977). Broneer became the field director at Isthmia in 1952 and remained in charge until 1967. He died in Corinth, Greece and was buried in Hagia Anna cemetery beside his first wife, Verna Anderson, who died in 1948. The papers of Oscar Broneer are maintained at the American School of Classical Studies at Athens  
In 1962, the Greek government honored him with the honorary command of the Royal Hellenic Order of the Phoenix. He received the Gold Medal of the Archaeological Institute of America in 1969. He was honorary vice president of the Archaeological Association of Greece and an honorary member of the International Olympic Committee. He was awarded membership in the German Archaeological Institute and the Royal Swedish Academy of Letters, History and Antiquities.  
- A critical interpretation of Plato's Republic, II 357A-362C (1922)
- Corinth IV, ii: Terracotta Lamps (1930)
- Corinth X: The Odeum (1932)
- Acrocorinth: excavations in 1926 (1930)
- Corinth I, iv: The South Stoa and Its Roman Successors (1954)
Note: His full bibliography can be found in Hesperia: The Journal of the American School of Classical Studies at Athens Volume 43, Issue 4 (1974).
- "Oscar Broneer, 97, Archeologist Who Found Ancient Greek Shrine". The New York Times. February 27, 1992. Retrieved December 5, 2015.
- "Oscar Theodore Broneer". Kungl. Vitterhetsakademien. Retrieved December 5, 2015.
- "Distinguished Archaeologist Oscar T. Broneer Dies". AP , Associated Press. February 27, 1992. Retrieved December 5, 2015.
- Oscar Broneer (1941). The lion monument at Amphipolis. Harvard University Press.
- "Dr. Oscar Theodore Broneer". Atlantisforschung, de. Retrieved December 5, 2015.
- "Triumph Over Time". Department of History, University of California, Santa Barbara. February 26, 2009. Retrieved December 5, 2015.
- Oscar Broneer; Mary Carol Sturgeon (1971). Isthmia: Temple of Poseidon. The School.
- "Broneer, Oscar Theodore". Dictionary of Art Historians. Retrieved December 5, 2015.
- "Oscar Broneer Papers". American School of Classical Studies at Athens. Retrieved December 5, 2015.
- Bibliography of Oscar Theodore Broneer
- Nancy Thomson de Grummond (2015). "Encyclopedia of the History of Classical Archaeology, page 199-200". Routledge. Retrieved December 5, 2015.