Jonathan Eric Adler (D.Phil, Oxford University, 1978; Ph.D., Brandeis University, 1974; Brooklyn College, 1970) was Professor of Philosophy at Brooklyn College and the City University of New York Graduate Center. He specialized in epistemological topics, including skepticism, induction, testimony, the argument from ignorance, and fanatical reasoning; he also wrote on philosophy of language, ethics and the philosophy of education.

Professor Adler served for four years as the president of the Association for the Philosophy of Education, and for nearly 20 years on the Executive Committee of the Society for Philosophy and Public Affairs. He also worked to make philosophy available to a wider public by serving on the U.S. board of editors of the popular magazine Philosophy Now.