Fridtjof Nansen (1861–1930) was a Norwegian polar explorer, scientist, diplomat, humanitarian, and Nobel laureate.

Nansen may also refer to:

People Nansen (surname) Nansen Fugan, the Japanese name for the Tang dynasty Chan (Zen) Buddhist master Nanquan Puyuan

Ships

Fridtjof Nansen-class frigate, the main surface combatant units of the Royal Norwegian Navy HNoMS Fridtjof Nansen (1930), a Norwegian coast guard ship HNoMS Fridtjof Nansen (F310), a 2004 frigate of the Royal Norwegian Navy

Places Cape Nansen, headland in the Greenland Sea, east Greenland Mount Nansen (Antarctica) Mount Fridtjof Nansen, Antarctica Mount Nansen (Yukon) in Yukon, Canada Nansen Island (disambiguation) Nansen Land, Greenland Fridtjof Nansen Land, a suggested but not adopted name for an area of Greenland Nansen (lunar crater) Nansen (Martian crater) Nansen Sound, a strait in Nunavut, Canada, between Ellesmere Island and Axel Heiberg Island Fridtjof Nansen Peninsula, SE Greenland

Organisations Nansen International Office for Refugees (), a 1930–1939 League of Nations organization Nansen Institute, an independent research foundation in Norway Nansenhjelpen, also known as Nansen Relief in English, a Norwegian humanitarian organisation

Other The Nansen Refugee Award Nansen (biography), a 1940 children's biography of the explorer by Anna Gertrude Hall Nansen (cat), ship's cat on Belgica during the Belgian Antarctic Expedition in 1897–98 Nansen passport, internationally recognized identity cards first issued by the League of Nations to stateless refugees Nansen bottle, an oceanographic sampling device