Tibor Richard Machan (; 18 March 1939 – 24 March 2016) was a Hungarian-American philosopher. A professor emeritus in the department of philosophy at Auburn University, Machan held the R. C. Hoiles Chair of Business Ethics and Free Enterprise at the Argyros School of Business & Economics at Chapman University in Orange, California until 31 December 2014.

He was a research fellow at the Hoover Institution at Stanford University, a research fellow at the Independent Institute, an adjunct scholar at the Cato Institute, and an adjunct faculty member of the Ludwig von Mises Institute. Machan was a syndicated and freelance columnist; author of more than one hundred scholarly papers and more than forty books, among them Why is Everyone Else Wrong? (Springer, 2008). He was, until spring 2015, senior contributing editor at The Daily Bell. He was senior fellow at the Heartland Institute in Arlington Heights, Illinois.

Machan rejected any division of libertarianism into left wing and right wing. He held that, by its nature, libertarianism is about political liberty for all individuals to do whatever is peaceful and non-aggressive. Machan was a minarchist.