Ronald Gervase Mountain (16 January 1897 – 1983) was an officer in the British Indian Army during World War II. "Gervase" may also be spelled "Gervais."
Mountain was born in Caistor, Lincolnshire. As part of Iraqforce, Brigadier Mountain commanded the 25th Indian Brigade of the Indian 10th Infantry Division during the Anglo-Iraqi War and the Syria-Lebanon campaign.
As part of Paiforce, Brigadier Mountain commanded the 25th Indian Brigade attached to the Indian 8th Infantry Division during the Anglo-Soviet invasion of Persia.