The Bat genus Molossus in the Mammal order Chiroptera contains seven species with a New World distribution from Mexico in the north to northern Argentina at its most southerly limit. Four of the genus also include various islands in the West Indies such as Costa Rica or Trinidad in their ranges.

The genus belongs to a group commonly referred to as Free-tailed bats.

Species list:

• M. ater
• M. barnesi
• M. bondae
• M. molossus
• M. pretiosus
• M. sinaloae
• M. trinitatus