Eucalyptus badjensis, the Big Badja gum, is a eucalyptus tree of south eastern Australia. It is a threatened species, with a rarity rating of 2RCi on ROTAP. Only occurring in wet forest, on hills and plateaus of far south eastern New South Wales. Soils are relatively fertile and rainfall is high. It may be locally frequent. A medium to tall tree, up to 40 metres in height. Rough bark is persistent on the lower parts of the trunk. However it is whitish/grey and smooth above or sometimes a smooth brownish/green. The bark sheds in long strips.