Philippe-Honoré Roy, QC (July 30, 1847 – December 17, 1910) was a lawyer and political figure in Quebec.

He represented Saint-Jean in the Legislative Assembly of Quebec from 1900 to 1908 as a Liberal.

He was born in Henryville, Canada East, the son of Édouard Roy and Esther Lamoureux, and was educated at the Collège Sainte-Marie-de-Monnoir, Victoria University and the Montreal Military College.

He articled in law with Louis-Amable Jetté, was admitted to the Quebec bar in 1871 and set up practice in Montreal.

Roy practised in partnership with Flavien-Guillaume Bouthillier and Amédée-Emmanuel Forget.