James Hansen (born 1941) is an American scientist and former head of the NASA Goddard Institute for Space Studies.

James or Jim Hansen may also refer to:

• James Hansen (politician) (1884–1951), member of the Legislative Assembly of Alberta

• James R. Hansen, American historian and author of First Man: The Life of Neil A. Armstrong

• James Lee Hansen, American sculptor

• Jim Hansen (Idaho politician) (born 1959), American politician from Idaho

• Jim Hansen (Missouri politician) (born 1947), American politician from Missouri

• Jim Hansen (Utah politician) (1932–2018), American politician from Utah

See also

• James Hanson (disambiguation)