The Ruwenzori duiker or Ruwenzori red duiker (Cephalophus rubidus) is a stocky but small antelope found only in the Ruwenzori Mountains between Uganda and, probably, the Democratic Republic of Congo. They may be a subspecies of the black-fronted duiker or the red-flanked duiker.
The Ruwenzori duiker weighs about and has a shoulder height of about . They have rufous coats, lighter on their underbellies and darker on their backs. Their short, prong-like horns are about long.
They are found in subalpine zones above , where they eat herbs. They are diurnal.