Syssphinx montana is a moth of the family Saturniidae. It is found in Mexico and (rarely) in southeastern Arizona.
The wingspan is . The males are smaller than the females. Adults are on wing from mid-July to early August. Adults do not feed.
The larvae feed on Haematoxylon brasalita, Cassia emarginata, Acacia farnesiana, Gleditsia triacanthos and Robinia pseudoacacia.