Bertrand Théobald Joseph de Lacrosse (29 January 1796 – 28 March 1865) was a French soldier and politician.

After a few campaigns on the frigate Hortense and the pram Ville de Mayence he joined the Army.

Lacrosse sat with the left and was mildly opposed to the policy of the ministers of King Louis Philippe.

[1] Lacrosse was again elected on 2 March 1839, supported the policy of Adolphe Thiers and opposed François Guizot.

In 1842, after the ministerial journal le Globe had published allegations against his father, he fought a duel with the journalist Adolphe Granier de Cassagnac in which he was hit by a ball that fractured his thigh.

Throughout his time as deputy in the July Monarchy he paid special attention to naval affairs.

[1] After the coup of 2 December 1851 Lacrosse was appointed a member of the Consultative Commission, and President of the section of the Navy and Finance in the interim Council of State.