| Named By: | Leif Stoermer in 1963 |
| Time Period: | Unavailable |
| Location: | Scotland - Glencartholm Volcanic Beds Formation |
| Size: | Details unavailable |
| Diet: | Insectivore |
| Fossil(s): | Partial remains of at least two individuals |
| Classification: | | Arthropoda | Chelicerata | Arachnida | Scorpiones | Holosternina | Gigantoscorpionoidea | Gigantoscorpionidae | |
Gigantoscorpio willsi is an extinct species of scorpion. which existed between 346.7 million and 330.9 million years ago. Its type specimen is BMNH In. 42706a,b, In. 42707, which is a 3D body fossil of its exoskeleton found near modern-day United Kingdom.