Jean-François-Joseph Duval, QC (July 17, 1802 – May 6, 1881) was a lawyer, judge and political figure in Quebec.

He was born in Quebec City, the son of François Duval and Ann Eliza Germain.

He was first elected to the provincial assembly in an 1829 by-election held after his associate Vallières de Saint-Réal was named a judge.

In 1839, he was named assistant judge in the Court of King's Bench following the suspension of Elzéar Bédard and Philippe Panet.

In December 1873, the members of the Montreal Bar passed a resolution stating the administration of justice at the Court of Queen's Bench was "inefficient, unsatisfactory and destructive" to public confidence, and they called for a Royal Commission to investigate the court's state of affairs.