Goanna is the name given to any of the various Australian monitor lizards of the genus Varanus, as well as to certain species from Southeast Asia.

There are around 20 species of goanna, 15 of which are endemic to Australia. They are a varied group of carnivorous reptiles that range greatly in size and fill several ecological niches. The Goanna features prominently in Aboriginal mythology and Australian folklore. Traditionally, it formed an important part the diet of many Aboriginal peoples.