Casuarina oligodon, the she oak, is a species of Casuarina tree first described by Lawrence Alexander Sidney Johnson. Casuarina oligodon is part of the genus Casuarina and the family Casuarinaceae. It is dioecious, very rarely monoecious.

Range She oak is native to Papua New Guinea.

References Casuarinaceae., 1996 IOPI Global Plant Checklist