| Pierre-Euclide Roy | |
| Honorific-Suffix: | M.L.C. |
| Office1: | Member of the Legislative Council of Quebec for Saurel |
| Successor1: | Joseph-Adolphe Dorion |
| Term Start1: | November 13, 1873 |
| Term End1: | October 31, 1882 |
| Birth Date: | 2 November 1826 |
| Birth Place: | Saint-Roch-de-l'Achigan |
| Death Place: | Saint-Pie, Quebec |
| Spouse: | (1) Émilie Aurélie Auger (1848) (2) Emma Davignon |
| Party: | Conservative Party of Quebec |
| Occupation: | Businessman |
Pierre-Euclide Roy (November 2, 1826 – October 1, 1882) was a Quebec businessman and politician.
He was born at Saint-Roch-de-l'Achigan, close to L'Assomption. He was the son of Pierre-Octave Roy, a merchant, and Josephte Beaudry.
Roy became a merchant at Saint-Pie, near Saint-Hyacinthe. He was also the treasurer of the Phillipsburg, Farnham and Yamaska Railway Company.
On March 6, 1848, he married Émilie Aurélie Auger. He later married Emma Davignon.
Roy was appointed to the Legislative Council of Quebec on November 19, 1873, representing the division of Saurel. He supported the Conservative Party of Quebec.
Roy died in office at Saint-Pie, on October 31 1882.[1]