Paul Leo-Mary Serruys C.I.C.M. (19 November 1912 – 16 August 1999) was a Belgian missionary, sinologist, and academic best known for his studies on the grammar of Classical Chinese, oracle bone script, and on the varieties of Chinese. He was a member of the Congregatio Immaculati Cordis Mariae (Congregation of the Immaculate Heart of Mary) missionary order, and proselyted in China in the 1930s, then later became a professor of Chinese at the University of Washington.