| Named By: | Octavio Mateus, Susannah C.R. Maidment & Nicolai A. Christiansen in 2009 |
| Time Period: | Late Jurassic, 150 Ma |
| Location: | Portugal - Sobral Formation |
| Size: | Estimated between 5.5 and 6 meters long |
| Diet: | Herbivore |
| Fossil(s): | Partial skull, mainly snout, and partial post cranial remains including cervical (neck) vertebrae, forelimbs, ribs, pelvic elements and neck plates. Further isolated remains have been attributed to the genus |
| Classification: | | Chordata | Reptilia | Dinosauria | Ornithischia | Thereophora | Stegosauria | Stegosauridae | Dacentrurinae | |
Miragaia (named after Miragaia, the parish in Portugal and geologic unit where its remains were found) is a genus of herbivorous stegosaurid dinosaur. Its fossils have been found in Upper Jurassic rocks in Portugal. Miragaia has the longest neck known for any stegosaurian, which included at least seventeen vertebrae.