Stegosaurus lived mainly in what is now western North America, especially the western United States, during the Late Jurassic period about 155–150 million years ago.

Quick Scoop

Where did the Stegosaurus live?

  • Most fossils come from the Morrison Formation in the western USA, including Colorado, Utah, and Wyoming.
  • It also lived more broadly across North America and parts of Europe, with remains found in places such as Utah, South Dakota, and Portugal.
  • The environment was warm and lush, with forested floodplains, open plains, and plenty of low plants to eat.

What was its habitat like?

  • Stegosaurus lived in terrestrial habitats, not swamps or oceans.
  • Its world was filled with ferns, cycads, and other low-growing vegetation that matched its low head and browsing style.
  • These regions were subtropical to warm-temperate, with seasonal rivers and floodplains.

Simple example

If you stood in Late Jurassic Colorado or Wyoming on a warm floodplain with low forests and lots of ferns, that’s the kind of place a Stegosaurus would likely be wandering through.

TL;DR: Stegosaurus lived in warm, plant-rich floodplains and forests of Late Jurassic western North America (especially Colorado–Utah–Wyoming), with evidence it also ranged into parts of Europe.

Information gathered from public forums or data available on the internet and portrayed here.