Seitaad is a genus of sauropodomorph dinosaur which lived during the Early Jurassic period in what is now southern Utah, United States.

It was collected from the Lower Jurassic Navajo Sandstone, the uppermost unit of the Glen Canyon Group, dating to the Pliensbachian stage, near Comb Ridge, San Juan County.

A phylogenetic study of Seitaad found it to be a plateosaur sauropodomorph, placing it in Massospondylidae or alternatively (a less probable position) in Plateosauridae, but its placement within the Plateosauria is not well understood.

The generic name is derived from Séít‘áád (Navajo language), a mythological sand monster from the Diné folklore who buried its victims in dunes.

The specific name honours Everett Ruess, a young artist, poet and naturalist, who mysteriously disappeared in 1934 while exploring southern Utah.