Walgettosuchus (meaning "Walgett crocodile") is a dubious or possibly invalid genus of extinct tetanuran theropod dinosaur that lived in Australia during the Late Cretaceous (Cenomanian).

[4] An opalised vertebra of a theropod dinosaur was discovered in 1905 by Tullie Cornthwaite Wollaston (May 17, 1863 – July 17, 1931) in an opal bearing sandstone at Lightning Ridge near Walgett, in New South Wales.

[5] The fossil was sent to the British Museum of Natural History and was reported in January 1909 by Arthur Smith Woodward.

During the 1930s Von Huene tended to form dinosaur names with the ending ~suchus instead of ~saurus because of the closer relationship to crocodiles than to lizards.

[5] In his 1990 review, Ralph Molnar noted that the type cannot be distinguished from tail vertebrae from ornithomimids or megaraptorids, and considered it to be an indeterminate theropod and a nomen dubium or (more likely) an invalid taxon.