Jean Grossaint De la Roche-yon (1713 - 1769) was a Swedish officer and spy.
He was active in Sweden as a Danish agent in 1740-44, supporting the Pro-Danish party against the Hats (party)-government and influencing members of the Peasant- and Priest-Estates in favor of Danish interests.
During the Dalecarlian rebellion (1743), he acted as a channel between the rebels and the Danish embassy.
He lived the rest of his life comfortable on the salary from a titular office in the Danish military.
His career has been described as typical of the many adventurers participating in the political life during the Swedish Age of Liberty.