William Hung, was a Chinese historian and sinologist who taught for many years at Yenching University, Peking, which was China's leading Christian university, and at Harvard University. He is known for bringing modern standards of scholarship to the study of Chinese classical writings, for editing the Harvard-Yenching Index Series, and for his biography of Du Fu, Tu Fu: China's Greatest Poet, which is considered a classic in the English world on the studies of Du Fu. He became a Christian while a student at the Anglo-Chinese College in Fuzhou, then went to Ohio Wesleyan University, Delaware, Ohio, Columbia University, and Union Theological Seminary. On his return to China, he became Professor and Dean of Yenching University, where he was instrumental in establishing the Harvard-Yenching Institute. He came to Harvard in 1946 and spent the rest of his life in Cambridge, Massachusetts, teaching and mentoring students.

Yenching University was a private research university in Beijing, China, from 1919 to 1952.