Porthos (disambiguation)
Porthos is a fictional musketeer.
Porthos may also refer to:
- Porthos (building), an apartment building in the Dutch city Eindhoven
 - Porthos (Star Trek), a fictional dog in Star Trek
 - Seawise Giant, the longest ship ever built, called Porthos at one point
 
See also
- Porthos Range, a mountain range in Antarctica