Ralph Moses Paiewonsky (November 9, 1907 in Saint Thomas, Danish West Indies – November 9, 1991, in Saint Thomas, U.S. Virgin Islands) was a businessman and politician who served as the ninth civilian governor of the United States Virgin Islands from 1961–1969.

His father owned A.H. Riise & Co. Ltd. an apothecary, general store, and a bay rum distillery in St. Thomas.

After he returned to the Virgin Islands his father bought the government-owned beverage rum distillery on St. Croix.

After he and his brother Isidor Paiewonsky managed various family businesses, and was the founder of the West Indies Bank and Trust Company in 1954 later acquired by Chase Manhattan.

Paiewonsky's administration established the Department of Housing and Community Renewal in 1962, and began a program of land acquisition and home construction.