Protaspis is an extinct genus of pteraspidid heterostracan agnathan which lived during the Early Devonian of the United States, with fossils found in marine strata in what is now Utah, Wyoming and Idaho.

Temporal range: Late Emsian
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Superclass: Agnatha
Class: Pteraspidomorphi
Subclass: Heterostraci
Order: Pteraspidiformes
Family: Protaspididae
Genus: Protaspis
Bryant, 1933
Type species
Pteraspis bucheri
Bryant, 1932
  • Protaspis bucheri (Bryant, 1932)
  • Protaspis dorfi (Bryant, 1932)
  • Protaspis macgrewi Denison, 1970