| General Post Office Adelaide | |
|---|---|
.jpg) View from Victoria Square / Tarntanyangga, c. 1885 | |
 | |
| General information | |
| Architectural style | Neoclassical |
| Location | Adelaide, South Australia, Australia |
| Coordinates | 34°55′33.96″S 138°36′0.66″E / 34.9261000°S 138.6001833°E |
| Construction started | 1867 |
| Completed | 1872 |
| Closed | 11 October 2019 |
| Design and construction | |
| Architect(s) | Edmund Wright and Edward Woods |
The General Post Office is a colonial-era building situated on 141 King William Street on the north-west corner of King William Street and Victoria Square. It is the former General Post Office for South Australia. Postal services operated from the building between 6 May 1872 and 11 October 2019.
A 14-story hotel was built behind the historic structure, starting in 2021. It opened as the Adelaide Marriott Hotel in 2024.