A novel maize variety designated X90N357 and seed, plants and plant partsthereofare produced by crossing inbred maize varieties. Methods for producing a maizeplant by crossing hybrid maize variety X90N357 with another maize plant aredisclosed. Methods for producing a maize plant containing in its geneticmaterial oneor more traits introgressed into X90N357 through backcrossing or genetictransformation, and to the maize seed, plant and plant part produced therebyaredescribed. Maize variety X90N357, the seed, the plant produced from the seed,andvariants, mutants, and minor modifications of maize variety X90N357 areprovided.Methods for producing maize varieties derived from maize variety X90N357 andmethods of using maize variety X90N357 are disclosed.