Terry Tempest Williams (born September 8, 1955), is an American writer, educator, conservationist, and activist. Williams' writing is rooted in the American West and has been significantly influenced by the arid landscape of Utah. Her work focuses on social and environmental justice ranging from issues of ecology and the protection of public lands and wildness, to women's health, to exploring humanity's relationship to culture and nature. She writes in the genre of creative nonfiction and the lyrical essay.

Williams has testified before Congress on women’s health, committed acts of civil disobedience from 1987 to 1992 in protest against nuclear testing in the Nevada Desert, and again, in March 2003 in Washington, D.C., with Code Pink, against the Iraq War. She has been a guest at the White House, has camped in the remote regions of the Utah and Alaska wildernesses.