The two subspecies of this pig are:
- S. b. barbatus (the nominate subspecies)
- S. b. oi (the western bearded pig)
As traditionally defined, the nominate is from Borneo, and S. b. oi is from the Malay Peninsula and Sumatra. Genetic evidence suggests this is incorrect, and S. b. oi is better limited to Sumatra, leaving bearded pigs from both Borneo and the Malay Peninsula in the nominate subspecies. Those from Bangka Island appear somewhat intermediate between the two subspecies.
The Palawan bearded pig (Sus ahoenobarbus) has formerly been considered a subspecies of the bearded pig. However, as indicated by its genetic and morphological distinctness, under the phylogenetic species concept (which does not use subspecies) it needs to be elevated to full species status; while the situation is less clear under other species concepts (as not all S. barbatus populations have been restudied in modern times), the presently available information seems to favor full species status for S. ahoenobarbus in any case.