Immanuel Chung-Yueh Hsu (Chinese: 徐中約, 1923 – October 24, 2005) was a sinologist, a scholar of modern Chinese intellectual and diplomatic history, and a professor of history at the University of California at Santa Barbara.
He held a Harvard-Yenching Fellowship at Harvard University from 1950 to 1954.
After receiving his doctorate from Harvard, he spent the years 1955–58 as a Research Fellow at Harvard's East Asian Research Center.
He taught modern Chinese history at the University of California at Santa Barbara from 1959 until his retirement in 1991, serving as Chair of the History department from 1970 to 1972.
His most widely read book is The Rise of Modern China, a survey of Chinese history from 1600 to the present, and a standard textbook.