Joseph Watson McDonald
- Born 14 August 1895, Endeavour Inlet, Marlborough Sounds, New Zealand
- Died details of death unknown
- Last rank Private
- Service number 30960
- Served In 20th Reinforcements, G Company
- Next of Kin Mrs. Mary Watson (mother), Spring Creek, Blenheim
- Pre-war occupation Labourer, Christchurch Meat Company, Picton
- ReligionMormon
- Enlisted22 August 1916
- Periods of service26 days in New Zealand. Total service 26 days
- Discharged16 September 1916 in consequence of being under age