Jacob Aall Ottesen Preus II (January 8, 1920, Saint Paul, Minnesota – August 13, 1994) was a Lutheran pastor, professor, author, seminary president and church denominational president.
He served as the eighth president of the Lutheran Church–Missouri Synod (LCMS) from 1969 to 1981.
He was a major figure in the "Seminex" theological/political controversy, which resulted in a schism in the LCMS during the early 1970s.