Luis Ortiz Monasterio (August 23, 1906 in Mexico City – February 16, 1990 in Mexico City) was a Mexican sculptor noted for his monumental works such as the Monumento a la Madre and the Nezahualcoyotl Foundation in Chapultepec Park. His work was recognized in 1967 with the Premio Nacional de Artes and was a founding member of the Academia de Artes.
Ortiz Monasterio is of the generation of Mexican sculptors which includes Oliverio Martínez, Francisco Marín, Juan Cruz Reyes, Federico Cantú,Federico Canessi and Carlos Bracho, which adopted elements of Art Deco and Cubism, using figures from the working class and indigenous populations. His artistic style is characterized by the use of classical and geometric elements, along with pre Hispanic influence. There is also influence from an artist named Ivan Mestrock, a Yugoslav artist whose works he saw in art magazines from Europe. In his works, he applied concepts from numerology and Pythagorism along with metaphysical concepts from the Aztec and Mayan cultures.