Albert Marie Adolphe Dagnaux (10 July 1861 in Paris – 22 November 1933 in Mantes-la-Jolie)^[1] was a French landscape, tableaux and figure painter.

His father was the owner of a small restaurant, "Le Dagnaux", in the 6th arrondissement of Paris.^[2] He began his studies in 1878 at the École nationale supérieure des beaux-arts under Professor Ernest Victor Hareux.^[3] His first exhibit was in 1883, at the Salon, but he received no recognition.^[3]

In 1890, he left the Salon to join the Société Nationale des Beaux-Arts, founded by Jean-Louis-Ernest Meissonier.^[3] It was at that time that he began to receive positive critical attention. His first major success came with his tableau Avenue du Bois de Boulogne; Le Club des Pannés, in 1893. Another tableau, Le jardin du général aux Invalides, was presented at the Exposition Universelle (1900).^[2]

Among his other works are the three frescoes in the refectory of the Lycée Fénelon (Les Jeux de l'enfance et de la jeunesse, Le Martin-pêcheur, Le nid) and a large panorama representing the fifth appearance of the Virgin Mary to Bernadette Soubirous, produced under the direction of Pierre and Louis-Robert Carrier-Belleuse.^[3]

A street in Mantes-la-Jolie was named in his honor.^[1]