| Honorific-Prefix: | The Hon. |
| Hippolyte Montplaisir | |
| Constituency Mp: | Champlain |
| Parliament: | Canadian |
| Predecessor: | John Jones Ross |
| Successor: | Onésime Carignan |
| Term Start: | 1874 |
| Term End: | 1891 |
| Office2: | Senator for Shawinegan |
| Appointed2: | John A. Macdonald |
| Predecessor2: | James Ferrier |
| Successor2: | Philippe-Jacques Paradis |
| Term Start2: | 1891 |
| Term End2: | 1927 |
| Birth Date: | 7 March 1839 |
| Birth Place: | Cap-de-la-Madeleine, Lower Canada |
| Death Place: | Trois-Rivières, Quebec |
| Party: | Liberal-Conservative |
Hippolyte Montplaisir (March 7, 1839 - June 20, 1927) was a Canadian politician.[1] He became Senator for Shawinegan, and Member of Parliament.
He was born on March 7, 1839, in Cap-de-la-Madeleine, Lower Canada[1] and was the son of Paschal Montplaisir and Victoire Crevier. He was educated at Trois-Rivières and was a farmer. Montplaisir served 25 years as mayor of Cap-de-la-Madeleine and was warden of Champlain County for 6 years. He married E. M. Aylr.[2]
He was first elected to the House of Commons of Canada for Champlain in the 1874 federal election. A Liberal-Conservative, he was re-elected in 1878, 1882, and 1887. In 1891, he was appointed to the Senate on the advice of John Alexander Macdonald representing the Senatorial Division of Shawinegan, Quebec. He served as an MP and senator for 53 years until his death in 1927.[1]
He died on June 20, 1927[1] in Trois-Rivières.[2]
Rue Montplaisir (Montplaisir Street) in Cap-de-la-Madeleine was named to honor him.