Louis-Émile Lassalle was a French painter and lithographer.

Louis-Émile was the son of Pierre Lassalle and Jeanne Beaugrand, and the husband of Marie-Louise Lamarque (1811-1874).

A student of Pierre Lacour, Émile Lassalle frequently exhibited lithographs of genre scenes, portraits and paintings by the masters at the Salon between 1834 and 1869.

In 1845, he produced lithographs based on drawings by Ernest Goupil for the publication of Jules Dumont d'Urville's Voyage au pole sud et dans l'Océanie sur les corvettes l'Astrobale et la Zélée, exécuté par ordre du roi pendant les années 1837-1838-1839-1840 (Journey to the South Pole and Oceania on the corvettes Astrobale and Zélée, carried out by order of the king during the years 1837-1838-1839-1840).

He was awarded a third class medal in 1847 and then a first class medal in 1848, followed by reminders in 1857, 1859 and 1861. In 1851, he was for some time a publisher at 38 rue de la Tour d'Auvergne in Paris.

He was made a Knight of the Legion of Honor in 1861. He was buried in the Montmartre cemetery.