General Post Office, Adelaide

General Post Office Adelaide
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 / -34.9261000; 138.6001833
Construction started	1867
Completed	1872
Closed	11 October 2019
Design and construction
Architect(s)	Edmund Wright and Edward Woods

General Post Office, a colonial-era building situated on 141 King William Street on the north-west corner of King William Street and Victoria Square, is the former General Post Office for South Australia.

Postal services operated from the building between 6 May 1872 and 11 October 2019. Construction began on the site to build a multi-level building above the GPO in 2021, with the new Adelaide Marriott Hotel slated to open in July 2024.