John W. Etchemendy (born 1952) is an American logician and philosopher who served as Stanford University's twelfth Provost.

John Etchemendy received his bachelor's and master's degrees at the University of Nevada, Reno, before earning his PhD in philosophy at Stanford in 1982.

At Stanford, Etchemendy served as director of the Center for the Study of Language and Information from 1990 to 1993, senior associate dean in the School of Humanities and Sciences from 1993 to 1997, and chair of the Department of Philosophy from 1998 to 2000.

He is a member of the American Philosophical Association, on the editorial boards of Synthese and Philosophia Mathematica, and a former editor of the Journal of Symbolic Logic.

Etchemendy's recent work has focused on the role of diagrams and other nonlinguistic forms of representation in reasoning.