Onuphe Peltier (November 13, 1821 – May 10, 1880) was an entrepreneur and political figure in Quebec. He represented L'Assomption in the Legislative Assembly of Quebec from 1871 to 1880 as a Conservative.
He was born in Saint-Pierre, Lower Canada, the son of Jean-Baptiste Peltier and Charlotte Cadot. He was educated at L'Assomption and established himself in business at L'Épiphanie. In 1842, he married Marie-Angèle Magnan. Peltier was mayor of L'Épiphanie from 1863 to 1869. He died in office there at the age of 58.