Legio X was the name of several Roman legions. It may refer to:

List of Roman legions

Crassus "Legio X" destroyed at Carrhae

Julius Caesar's Legio X Equestris, also known as X Veneria;

Augustus's Legio X Gemina, which resulted of the amalgation of the X Equestris with another unknown legion;

Legio X Fretensis, a legion widely know for the suppression of the First Jewish rebellion. This legion conquered Masada.