Léon-Lucien Goupil, sometimes known as Léon Goupil, was a French painter.

Son of Marie-Élisabeth Havard and Pierre-Charles Goupil, Paul Léon Lucien Goupil was born in Paris on January 11, 1834. He was the elder brother of Jules-Adolphe Goupil, a painter with whom he should not be confused.

He studied at the Ecole des Beaux-Arts in Paris under Henry and Ary Scheffer.

He made his debut at the Paris Salon in 1850 with a painted self-portrait; he is said to live at 9 rue de Montyon. From 1853 to 1859, he exhibited mainly portraits. In 1863, he exhibited Anne de Boleyn before her judges at the Salon des refusés. In 1866, at the Salon des Refusés, he exhibited La Fiancée du Timbalier, based on a theme by Victor Hugo.

From 1872, he lived between Brussels and Antwerp, staying with his brother when he went down to Paris. Around 1879, he returned to live in the French capital. In 1887, still at the Salon, he exhibited Portrait du dompteur Pezon, his last participation in the event.

He died on February 16, 1891 in the 18th arrondissement of Paris, at his home at 32 rue Tholozé. He was married to Barbe-Eugénie Baucher.

The painter Paul Forêt (1856-1934) was his pupil.