Tapuiasaurus (meaning "Tapuia lizard") is a genus of herbivorous sauropod dinosaur. It is a nemegtosaurid titanosaur which lived during the Lower Cretaceous period (Aptian age) in what is now Brazil. Its fossils, including a partial skeleton with a nearly complete skull, have been recovered from the Quiricó Formation (Sanfranciscana Basin) at Minas Gerais, eastern Brazil. This genus was named by Hussam Zaher, Diego Pol, Alberto B. Carvalho, Paulo M. Nascimento, Claudio Riccomini, Peter Larson, Rubén Juarez-Valieri, Ricardo Pires-Domingues, Nelson Jorge da Silva Jr. and Diógenes de Almeida Campos in 2011, and the type species is Tapuiasaurus macedoi.