Fatty alcohols are aliphatic alcohols derived from natural fats and oils. They are the counterparts of fatty acids and fatty aldehydes. They usually have even number of carbon atoms. Production from fatty acids yields normal-chain alcohols—the alcohol group (-OH) attaches to the terminal carbon. Other processing can yield iso-alcohols—where the alcohol attaches to a carbon in the interior of the carbon chain.

The smaller molecules are used in cosmetics and food, and as industrial solvents. Some of the larger molecules are important as biofuels.

Due to their amphipathic nature, fatty alcohols behave as nonionic surfactants. They find use as emulsifiers, emollients and thickeners in cosmetics and food industry.
Fatty alcohols are a common component of waxes, mostly as esters with fatty acids but also as alcohols themselves.