Qantassaurus (KWAN-tuh-SAWR-us) (named for the Australian airline, Qantas, which helped transport the fossil) was a plant-eating dinosaur found in Victoria, Australia. This ornithopod had large eyes and a long tail. It was the size of a small kangaroo.

It is known from a skeleton and a partial skull that dates from about 110 million years ago, during the Cretaceous period. Qantassaurus was named by Pat Vickers-Rich in 1997. The type species is Qantassaurus intrepidus.