The History of the Northwest Territories begins with the population of the region by First Nations peoples, and proceeds through the transformation of it into provinces and territories of the nation of Canada, including the modern administrative unit of the Northwest Territories. When Europeans settlers began to divide the continent, the Northwest Territories included much of the sparsely populated regions of what is now western Canada. Over time, the provinces of Alberta, Saskatchewan, and Manitoba were formed out of the territories. In 1898, the Yukon territory became a separate entity and in 1999 Nunavut was formed from the eastern section.
Long before the Europeans arrived, Inuit and First Nations peoples inhabited the land area which became the Northwest Territories. Native Inuit included the Mackenzie, Copper, Caribou and Central nations. There were also many nations when the Europeans first arrived, among them the Yellow-Knife, Chipewyan, Sekani, Beaver, Nahanni, Dogrib and Slavey.
Martin Frobisher's expeditions in the 1570s were the first recorded visits to the Northwest Territories by a European. In 1610, Henry Hudson, while looking for the Northwest Passage, landed briefly on the western shore of the bay that bears his name. His discovery opened the interior of the continent to further exploration. Other early explorers include Luke Foxe, John Davis, Robert Bylot, Thomas Button, George Weymouth, Thomas James and William Baffin.