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