Charles Jacques Huault de Montmagny (c. 1599 – 1654) was governor of New France from 1636 to 1648. He was the first person to bear the title of Governor of New France; he succeeded Champlain, who governed the colony as Lieutenant General of New France. Montmagny was able to negotiate a peace treaty with the Iroquois at Trois-Rivières in 1645.
His name 'Montmagny' roughly translated into the Iroquoian languages as "Onontio" (Great Mountain), a title which the Iroquois Confederacy used for all subsequent Governors of Quebec.
Late in his life he was commissioned by the Knights Hospitaller to oversee the Hospitaller colonies in the Caribbean. His presence there was ineffective, since he was bogged down in power struggles with the sitting governor, Phillippe de Longvilliers de Poincy. Montmagny died on Saint Christopher in 1654.
Montmagny, Quebec, former Montmagny (provincial electoral district)|former electoral district of Montmagny]] and Montmagny Regional County Municipality are named after him.