Atta insularis is a species of leafcutter ant, a New World ant of the subfamily Myrmicinae of the genus Atta endemic to Cuba.

This species is from one of the two genera of advanced fungus-growing ants within the tribe Attini.

A. insularis is unique to Cuba, and has great polymorphism.

[citation needed] The nests are huge, and may comprise one or several mounds that can be spaced several metres apart.

[3] Quantitative studies in the behaviour of A. insularis has been performed both in laboratory-controlled conditions,[4] and in the wild.