The hacker ethic is a philosophy and set of moral values within hacker culture. Practitioners believe that sharing information and data with others is an ethical imperative. The hacker ethic is related to the concept of freedom of information, as well as the political theories of anti-authoritarianism, socialism, liberalism, anarchism, and libertarianism.

While some tenets of the hacker ethic were described in other texts like Computer Lib/Dream Machines (1974) by Ted Nelson, the term hacker ethic is generally attributed to journalist Steven Levy, who appears to have been the first to document both the philosophy and the founders of the philosophy in his 1984 book titled Hackers: Heroes of the Computer Revolution.