Amundsen Gulf is a gulf located in Canadian Northwest Territories, between Banks Island and Victoria Island and the mainland . It is approximately 250 mi (400 km) in length and about 93 mi (150 km) across where it meets the Beaufort Sea.

The Amundsen Gulf was explored by Norwegian explorer Roald Amundsen between 1903 and 1906. The gulf is at the western end of the famous Northwest Passage, a route from the Atlantic Ocean to the Pacific.

Few people live along the shores of the gulf, but there are a few towns and communities including: Sachs Harbour, Ulukhaktok and Paulatuk. Heading north in the gulf one would find the Prince of Wales Strait. Heading southeast and east, the gulf leads through the Dolphin and Union Strait, past Simpson Bay and into the Coronation Gulf. From there one would go through the Dease Strait and into the Queen Maud Gulf, and eventually head northeast into the Victoria Strait. Heading west and northwest a traveller would first enter the Beaufort Sea and then the Arctic Ocean.

Roald Engelbregt Gravning Amundsen (Norwegian pronunciation: [ˈɾuːɑl ˈɑmʉnsən]; 16 July 1872 – c. 18 June 1928) was a Norwegian explorer of polar regions. He led the Antarctic expedition (1910-12) to discover the South Pole in December 1911 and he was the first expedition leader to (undisputedly) reach the North Pole in 1926. He is also known as the first to traverse the Northwest Passage (1903-06). He disappeared in June 1928 while taking part in a rescue mission. Amundsen, along with Douglas Mawson, Robert Falcon Scott, and Ernest Shackleton, was a key expedition leader during the Heroic Age of Antarctic Exploration.

Amundsen was born to a family of Norwegian shipowners and captains in Borge, between the towns Fredrikstad and Sarpsborg. His father was Jens Amundsen. He was the fourth son in the family. His mother chose to keep him out of the maritime industry of the family and pressured him to become a doctor, a promise that Amundsen kept until his mother died when he was aged 21, whereupon he quit university for a life at sea. Amundsen had hidden a lifelong desire inspired by Fridtjof Nansen's crossing of Greenland in 1888 and the doomed Franklin expedition. As a result, he decided on a life of intense exploration.^{[citation needed]}