Lithium stearate is a chemical compound with the formula LiO<sub>2</sub>C(CH<sub>2</sub>)<sub>16</sub>CH<sub>3</sub>. It is formally classified as a soap (a salt of a fatty acid). Lithium stearate is a white soft solid, prepared by the reaction of lithium hydroxide and stearic acid.
Lithium stearate and lithium 12-hydroxystearate are lithium soaps, and are components of lithium greases and release agents.