Donald Thomas Critchlow (born May 18, 1948) serves as Director for the Center for American Institutions at Arizona State University, where he is a professor in History.

He has appeared on C-SPAN, NPR, BBC World News, and many talk radio programs.

He serves also as the editor-in-chief of the Journal of Policy History published by Cambridge University Press.

In the fall of 2010, he accepted a professorship in history at Arizona State University and in 2016 he was named Katzin Family Professor.

He serves as lead for the undergraduate certificate Program in Political History and Leadership at Arizona State University.