The Australian Government on 1 January 1901
Prime Minister: Edmund Barton (Protectionist)
Departments of State (7)
- Attorney-General's Department1901–present
- Department of Defence1901–1921
- Department of External Affairs1901–1916
- Department of Home Affairs1901–1916
- Department of the Treasury1901–present
- Department of Trade and Customs1901–1956
- Postmaster-General's Department1901–1975
Other bodies (6)
Central government
- Governor-General's Office 1901–1984
Parliament
- Department of the House of Representatives 1901–present
- Department of the Parliamentary Library 1901–2004
- Department of the Parliamentary Reporting Staff 1901–2004
- Department of the Senate 1901–present
- Joint House Department 1901–2004