Augustin Perrault (May 16, 1779 – August 27, 1859) was a woodworker, merchant and political figure in Lower Canada.
He represented York in the Legislative Assembly of Lower Canada from 1820 to 1824.
He was born in Saint-François, the son of Jean-Jacques Perrault and Louise Saint-Onge, and established himself in business in Montreal.
Perrault served as lieutenant in the militia during the War of 1812.
He participated in the founding of the Merchants Bank in 1846.
Perrault did not run for reelection to the assembly in 1824.
He served on the municipal council for Montreal from 1835 to 1836.