Louis Auguste Olivier (November 1, 1816 – September 18, 1881) was a Quebec lawyer, judge and political figure.

He was a Liberal member of the Senate of Canada for De Lanaudière division from 1867 to 1873.

He was born in Berthier-en-Haut, Lower Canada in 1816, the grandson of Louis Olivier, and studied at the Séminaire de Nicolet.

He was elected to the Legislative Council of the Province of Canada for Lanaudière division in an 1863 by-election and served until Confederation, when he was named to the Senate.

In 1873, he resigned to accept an appointment as puisne judge in the Quebec Superior Court for Joliette district.