Incumbents
- Monarch – King George VI
- Governor-General – Alexander Hore-Ruvthen, 1st Baron Gowrie
- Prime Minister – Joseph Lyons (until 7 April), then Sir Earle Page (until 26 April), then Robert Menzies
Read more about this topic: 1939 In Australia
Incumbents
Read more about this topic: 1939 In Australia