Schleitheimia (named after the type locality of Schleitheim), is an extinct genus of sauropodiform sauropodomorph dinosaur,[1] from the Gruhalde Member of Klettgau Formation of Switzerland.

Finds made by Schultz near Hallau-Schwärzibuck were considered to represent a different previously unknown taxon and remained unnamed.

The holotype, PIMUZ A/III 550, was found in a layer of the Klettgau Formation dating from the Norian.

[1] A phylogenetic analysis conducted by Rauhut and colleagues found Schleitheimia to be a derived sauropodiform closely related to Sauropoda, or a basal member of that clade, depending on the definition used (node or stem based).

A cladogram from that analysis is shown below:[1] Xingxiulong Anchisaurus Leonerasaurus Mussaurus Aardonyx Sefapanosaurus Meroktenos Melanorosaurus Camelotia Lessemsaurus Antetonitrus Ingentia Blikanasaurus Pulanesaura Gongxianosaurus Schleitheimia Isanosaurus Tazoudasaurus Sauropoda sensu Salgado et al., 1997 (=Gravisauria)