Acromyrmex balzani is a species of leaf-cutter ant of the subfamily Myrmicinae. It is found Argentina, Paraguay, and Brazil. It occurs in Cerrado and semideciduous seasonal forest. It is a grass-cutting species.
In addition to the nominotypical subspecies, one subspecies is recognized:
A colony of Acromyrmex balzani consists of several subnests (i.e., polydomy), with one queen each. The underground nests contain 1âÂÂ14 fungus chambers and can reach a depth of at least . There are no waste chambers; the waste is deposited outside the nest.