Redox (reduction–oxidation reaction) is a chemical reaction in which the oxidation states of atoms are changed.

Redox may also refer to:

RedoxOS, an operating system written in the Rust programming language Redox Brands, a former company established in Ohio, US REDOX, a.k.a. Hexone, an obsolete method of nuclear reprocessing

See also Redox titration, a type of titration based on a redox reaction between the analyte and titrant