Erika Eichhorn Bourguignon (February 18, 1924 – February 15, 2015) was an Austrian-born American anthropologist known primarily for her work on possession trance and other altered states of consciousness. She was “considered the premier anthropological authority on trance, possession, and altered states of consciousness” and "one of the founders of the field of anthropology of consciousness." She was born in Vienna, Austria, but left with her parents in 1938. After receiving a B.A. from Queens College in 1945, she began graduate studies at Northwestern University, working there under Melville J. Herskovits and Alfred Irving Hallowell. She did field research among the Chippewa in Wisconsin and in Haiti (1947–48).