| Atacamatitan Temporal range: Late Cretaceous,
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|---|---|
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| Holotype SGO-PV-961 | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | †Sauropodomorpha |
| Clade: | †Sauropoda |
| Clade: | †Macronaria |
| Clade: | †Titanosauria |
| Clade: | †Lithostrotia |
| Genus: | †Atacamatitan Kellner et al., 2011 |
| Type species | |
| †Atacamatitan chilensis Kellner et al., 2011
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Atacamatitan (meaning "Atacama Desert titan") is a genus of titanosaurian sauropod dinosaurs from the Late Cretaceous Tolar Formation of Chile.