Fostoria (named after Robert Foster who discovered the type locality and bones; the specific name dhimbangunmal means "sheep yard" in the languages of the Yuwaalaraay, Yuwaalayaay, and Gamilaraay peoples of Australia) is a genus of iguanodontian ornithopod dinosaur from the Griman Creek Formation of New South Wales, Australia.

[1] Fostoria was classified within the clade Iguanodontia by the describing authors, who entered it into a recent phylogenetic matrix but with some modifications and recodings.

and Talenkauen, supported by the following synapomorphies:[1] However, a recent study covering the phylogeny of Cerapoda using the same matrix as Bell et al. (2019) found Fostoria to be within the Rhabdodontomorpha, sharing the following features with the derived rhabdodontids: (1) A nearly vertical suture between its supraoccipital and opisthotics and (2) the length of the distolateral condyle on the distal extremity of femur (not accounting for its posterolateral condylid) is less than 40% the total distal width of the femur.

[2] In 1984, Bob Foster, an opal miner, discovered a vertebra from an ornithopod in Lightning Ridge.

[3] Foster eventually found so many fossils in his mine that he showed his finds to paleontologists of the Australian Museum in Sydney.