Marius Germinal Boyer (22 September 1885, Marseille – 24 December 1947, Casablanca^[1]) was a French architect active in Casablanca, Morocco.

Marius Boyer was admitted to the École nationale supérieure des Beaux-Arts in Paris in 1904.^[1] He was a student of Gabriel Héraud [fr] and ascended to the seconde classe in 1904 and to the première classe class in 1908.^[2] At the time, students had to ascend from the seconde classe to the première classe.^[3] He won the Prix Américain de l’Architecture in 1910, and he earned his diploma around 1913.^[2]

He moved to Casablanca, then under the authority of the French Protectorate in Morocco, where he worked with Jean Balois.^[4] He worked as a professor of architecture at l'Ecole des Beaux-Arts de Casablanca.^[2]

Some of his important projects include the Glawi Building (1922), the Vigie Marocaine Building (1924), the Lévy-Bendayan Building (1928), the Wilaya Building of Casablanca (1928-1936), the Moses Assayag Building (1930-1932), the Hotel Transatlantique (c. 1932), the Shell Building [ar] (1934), Cinema Vox (c. 1935), and the Anfa Hotel 1938.^[2]