Janet Benson Bennion (born October 2, 1964) is Professor of Anthropology at Lyndon State College, Vermont, United States. She specializes in gender dynamics in Mormon fundamentalist communities which practice polygamy. Bennion is one of the world's leading ethnographers of North American plural marriage. She has raised the question of decriminalization of plural marriage in a variety of radio and television forums and several international scholar venues at Brandeis University and the European University Institute in Florence, Italy.