Adolphe Mouron Cassandre, born January 24, 1901 - died June 19, 1968, was an influential Ukrainian-French painter, commercial poster artist, and typeface designer.

Born Adolphe Jean-Marie Mouron in Karkov, Ukraine to French parents, as a young man, Cassandre moved to Paris, France where he studied at the École des Beaux-Arts and at the Académie Julian. Needing to earn a living, the popularity of posters as advertising afforded him an opportunity to work for a Parisian printing house. Inspired by cubism as well as surrealism, he earned a reputation with works such as Bûcheron (Woodcutter), a poster created for a cabinetmaker that won first prize at the 1925 Exposition Internationale des Arts Décoratifs.

Cassandre became successful enough that with the help of partners he was able to set up his own advertising agency called Alliance Graphique. Serving a wide variety of clientele, during the 1930s, his creations for the Dubonnet wine company were among the first posters designed in a manner that allowed them to be seen by occupants in fast-moving vehicles. His posters are memorable for their innovative graphic solutions and their frequent denotations to such painters as Max Ernst and Pablo Picasso. In addition, he taught graphic design at the Ecole des Arts Décoratifs and then at the Ecole d'Art Graphique.

With typography an important part of poster design, the company created several new typeface styles. Cassandre developed Bifur in 1929, the Sanserif Acier Noir in 1935, and in 1937 an all-purpose font called Piegnot . In 1936, his works were exhibited at the Museum of Modern Art in New York City which led to commissions from Harper's Bazaar to do cover designs.

With the onset of World War II, Cassandre served in the French army until the fall of France. His business long gone, he survived by creating stage sets and costumes for the theatre, something he had dabbled in during the 1930s. After the war, he continued this line of work while also returning to easel painting. In 1963, he designed the well-known Yves Saint-Laurent logo.

In his later years, Adolphe Mouron Cassandre suffered from bouts of depression that led to his suicide in Paris in 1968.

In 1985, Henri Mouron told his father's life story in the a book titled A.M. Cassandre .