Frontenac, Louis de Buade, Comte de Palluau et de (1620–1698), a French soldier and colonial administrator. Frontenac served as governor of New France (French Canada), 1672–82 and 1689–98. He envisioned a great empire for France in North America, sponsoring the explorations of LaSalle, Joliet, and Marquette, and successfully defended the colony from attacks by the Indians and the English. As a ruler, however, he also was arrogant, impulsive, and quarrelsome.

Frontenac had served as an army officer in Italy, Flanders, and Germany. Soon after arriving in Canada as governor, he built Fort Frontenac (at what is now Kingston, Ontario), on Lake Ontario. His efforts to expand the fur trade westward brought conflict with the Iroquois and also were opposed by the French government, which recalled him in 1682. However, when the English and their Indian allies threatened New France, he was reappointed governor. War with the English (King William's War) broke out in 1689. Frontenac successfully defended Quebec in 1690. His men then defeated the Iroquois and raided colonial settlements in New England and New York. Fighting was halted by the Treaty of Ryswick in 1697.