• There are 3 subspecies of this species, not surprisingly given its home is an island nation.

There are three recognized subspecies of the Philippine warty pig:

• S. p. philippensis (from Luzon and nearby islands)
• S. p. mindanensis (from Samar, Leyte, and other islands near Mindanao)
• S. p. oliveri (from Mindoro)

The last subspecies is a threat to the Mindoro Warty pig and its long-term survival, as a result of hybridisation. The species as a whole is considered as vulnerable, but I have been unable to find any clear estimates for the population size of each of these subspeices.