Louis-Tancrède Bouthillier (March 1, 1796 – February 28, 1881) was Sheriff of Montreal, a Canadian officer, merchant and landowner.

In 1833, Bouthillier bought eight lots in Montreal, one of which was in the Côte Sainte-Catherine, where he built a large brick house that he named Outre-Mont (over the mountain).

Bouthillier hired mason Louis Comte to build a combination store and residence on the site, which he owned until his death.

From 1850, he held the post of custom duty collector in Montreal, a position he left in 1863 to become sheriff of the city for nearly ten years.

In 1862, he purchased the manor house of his uncle by marriage, the late Clément-Charles Sabrevois de Bleury.