Morton Beiser (born November 16, 1936) is a Canadian professor, psychiatrist and epidemiologist known for his research in the fields of immigration and resettlement.

During the 1980s he continued his research as Principal Investigator for the "Refugee Resettlement Project", a ten-year study of the health and experiences of the "Boat People", immigrants from Southeast Asia to Canada.

[1] In 1986, he was appointed chair of a federal government task force on the issue, and in 1988 authored the final report of the committee, After the Door Has Been Opened.

He has authored more than 150 scientific research papers, a book about the Boat People entitled Strangers at the Gate, and is co-editor of the forthcoming Immigration, Ethnicity, and Health.

He lives in Toronto, Ontario, Canada, and in Grignan, France, with his husband, author J. Timothy Hunt.