| Named By: | J. D. Harris & P. Dodson in 2004 |
| Time Period: | Late Jurassic |
| Location: | USA, Montana, Carbon County - Morrison Formation |
| Size: | Estimated about 14- 15 meters long |
| Diet: | Herbivore |
| Fossil(s): | Partial post cranial skeleton |
| Classification: | | Chordata | Reptilia | Dinosauria | Saurischia | Sauropoda | Diplodocoidea | |
Suuwassea (meaning "ancient thunder") is a genus of dicraeosaurid sauropod dinosaur found in the Upper Jurassic strata of the Morrison Formation, located in southern Carbon County, Montana, United States. The fossil remains were recovered in a series of expeditions during a period spanning the years 1999 and 2000, described by J.D. Harris and Peter Dodson in 2004. They consist of a disarticulated but associated partial skeleton, including partial vertebral series and limb bones.