Ursinus may refer to:
Mononym Ursinus of Bourges (fl. 3rd or 4th century), Catholic saint, first bishop of Bourges Antipope Ursicinus (died c. 381) Ursinus (bishop) (fl. c. 560 and/or 6th-7th centuries), bishop of (Windisch)-Konstanz Ursinus the Abbot (fl. 7th century), presumed biographer of Saint Leodegar
Surname Benjamin Ursinus von Bär (1646–1720), Court Preacher to the Elector of Brandenburg Johannes Heinrich Ursinus (1608–1667), German Lutheran theologian Michael Ursinus (born 1950), German scholar of Islam Oskar Ursinus (1877–1952), German aviation pioneer Sophie Ursinus (1760–1836), German serial killer Zacharias Ursinus (1534–1583), German theologian
Other uses Ursinus College, Collegeville, Pennsylvania, U.S.