Eucalyptus dura, also known as the smooth-branched ironbark, or gum-topped ironbark, is a Eucalyptus tree of eastern Australia. It is a relatively uncommon tree found on dry ridges and mountainous regions of north-east New South Wales and south-east Queensland, particularly around the McPherson Range and peaks such as Mount Greville. The leaves of E. dura are rich in oils, particularly β-phellandrene and 1,8-cineole. These oils may be suitable for development of a bacteriostat.