Joseph Louis Gay-Lussac (1778–1850) was a French chemist and physicist.

Gay-Lussac may also refer to:

Astronomy Gay-Lussac (crater) 11969 Gay-Lussac

Chemistry Gay-Lussac's law () Gay-Lussac scale

Other uses Gaylussacia Gay-Lussac–Humboldt Prize French submarine Gay-Lussac (Q69, 1910) (FGL)

See also