| Alex MacDonald | |
| Nickname: | Bandy |
| Birth Date: | 13 April 1898 |
| Birth Place: | Walcha, New South Wales |
| Death Date: | [1] |
| Death Place: | Sydney, New South Wales |
| Allegiance: | Australia |
| Branch: | Australian Army |
| Serviceyears: | 1940–1950 |
| Rank: | Lieutenant Colonel |
| Commands: | Australian Cadet Corps Jungle Training Centre Darwin Mobile Force |
| Battles: | Second World War |
Lieutenant Colonel Alex Bath "Bandy" MacDonald (13 April 1898 – 12 May 1981) was an Australian Army officer.
MacDonald was born in Walcha, New South Wales,[2] son of Emily (née Bath) and Alexander Mark MacDonald.[3] He was educated at Newington College from 1913 until 1916.[4]
MacDonald served during the Second World War and commanded the Jungle Training Centre and Darwin Mobile Force.[5] At war's end he became Director of the Australian Cadet Corps[6] and then was senior Australian military observer with the United Nations Commission for Indonesia.[7] He was discharged from the army on April 13, 1950.[8] His portrait is held by the Australian War Memorial.