Joseph-Alexandre Mercier (3 December 1874 – 16 July 1935) was a Liberal party member of the House of Commons of Canada.
He was born in Montreal, Quebec and became a lawyer.
Mercier attended St. Mary's College in Montreal, then earned his Bachelor of Arts degree at Université Laval at Montreal.
Mercier died on 16 July 1935 before he completed his term in the 17th Canadian Parliament.
This article about a Quebec Member of Parliament from the Liberal Party of Canada is a stub.