Julián Marías Aguilera (17 June 1914 – 15 December 2005) was a Spanish philosopher associated with the Generation of '36 movement.

He was a pupil of the Spanish philosopher José Ortega y Gasset and member of the Madrid School.

During the conflict Marías sided with the Republicans, although his actual contributions were limited to propaganda articles and broadcasts.

After the end of the war in 1939, Marías was imprisoned for several months on false charges, and was unable to carry out university teaching activities after his release.

His doctoral thesis was rejected due to the committee's animosity towards someone who was a disciple of Ortega.