Baron Joseph Maria Christoph von Lassberg (b. Donaueschingen, 10 April 1770; d. 15 March 1855) was a German antiquary.

His father Joseph Maria Freiherr von Laßberg (1731-1813) held the position of Chief Forester in the service of Prince zu Fürstenberg.

When the regency ended in 1817, Lassberg resigned his position and retired to private life, residing first on his estate at Eppishausen in Thurgau, and from 1838 at Castle Meersburg on Lake Constance.

He was twice married, his second wife being Baroness Maria Anna Jenny von Droste-Hülshoff (1795–1859), a sister of the famous poet Annette.

His literary work consisted chiefly in editing medieval German poems, many of which were published under the pseudonym of Meister Sepp von Eppishusen.