Strategus is a genus of rhinoceros beetles belonging to the family Scarabaeidae. The genus is widespread in America from Kansas to South America.
Species within this genus can reach a length of . These large beetles have a more or less cylindrical body. They have a striking sexual dimorphism. Males are generally markedly larger than the females and have a long horn on the head and also two forward-looking horns on pronotum.
Species within this genus include: