The Vietnam partridge, Annam partridge, or Annam hill partridge, Arborophila merlini, is a species of hill partridge in the Phasianidae family of birds. The taxonomy of the three scaly-breasted lowland hill-partridges is confused, and this species is sometimes treated as a subspecies of scaly-breasted partridge (A. chloropus), or both are lumped with chestnut-necklaced partridge (A. charltonii). It is endemic to Vietnam in the dense moist lowland forests of central Annam.