Edin Cornelius Kristoffersen Alfsen (Chinese: 安理生, 15 April 1896 – 1 August 1966) was a Norwegian-American Lutheran missionary affiliated with the Norwegian Mission Alliance. He was also a founder of the Norwegian Tibet Mission. Alfsen worked at the Mayo Clinic in the United States from 1945 to 1958. He also made public speaking appearances describing his experience in Tibet. He made a trip to Taiwan via Singapore, and later that year, to in Malaysia, where he established an independent mission named the South East Asia Bible Fellowship. He became a U.S. citizen in 1956.