| Agency Name: | Department of Home Affairs |
| Formed: | 20 December 1977 |
| Preceding1: | Department of Administrative Services (II) Department of the Prime Minister and Cabinet |
| Dissolved: | 3 November 1980 |
| Superseding: | Department of Primary Industry (II) Department of Home Affairs and Environment |
| Type: | Department |
| Jurisdiction: | Commonwealth of Australia |
| Minister1 Name: | Bob Ellicott |
| Minister1 Pfo: | Minister |
| Chief1 Name: | A.R. Palmer |
| Chief1 Position: | Acting Secretary (1977–1978) |
| Chief2 Name: | Don McMichael |
| Chief2 Position: | Secretary (1978–1980) |
| Headquarters: | Canberra |
The Department of Home Affairs was an Australian government department that existed between December 1977 and November 1980. It was the third so-named Australian government department.
Information about the department's functions and government funding allocation could be found in the Administrative Arrangements Orders, the annual Portfolio Budget Statements and in the department's annual reports.
At its creation, the department dealt with:
The department was an Australian Public Service department, staffed by officials who were responsible to the Minister for Home Affairs, Bob Ellicott.