Lassalle is a surname, originally a Gasconic patronymic. People with the name include:
Agnès Lassalle, French murder victim Camille-Léopold Cabaillot-Lassalle (1839-1902), French painter Ferdinand Lassalle (1825–64), German socialist Gilbert Duclos-Lassalle (born 1954), French cyclist Hugo Enomiya-Lassalle (1898–1990), Jesuit priest and Zen Buddhist Jean Lassalle (1847–1909), French operatic baritone Jean Lassalle (born 1955), French politician Rex Lassalle (1945–2025), Trinidad-Tobago lieutenant and mutineer Robert Lassalle (1882–1940), French politician