Paul-Adolphe Rajon (1843 Dijon – 8 June 1888 Auvers-sur-Oise, Val d'Oise) was a French painter and printmaker, who started his career as a photographer while studying at the École des Beaux-Arts in Paris under Isidore-Alexandre-Augustin Pils.
Rajon was critically praised in France, Great Britain and the United States, through the acquaintance with the New York-based American print dealer Frederick Keppel.