Coordinates: 27°28′4.44″S 153°01′40.44″E / 27.4679°S 153.0279°E / -27.4679; 153.0279

Post Office Square is a public square which is built over a collection of shops. The square is situated between Queen Street and Adelaide Street, Brisbane, Queensland, Australia.

Post Office Square was opened on 5 April 1984.

The Post Office Square park area is on the Queen Street level, while the Post Office Square shops are on the Adelaide Street level.

There are stairwells leading from the park to the shopping centre from Post Office Square park area, including a stairwell from around the centrally-located round-shaped Post Office Square water feature.

Post Office Square is opposite the General Post Office building, on the Queen Street side, and ANZAC Square on the Adelaide Street side.

In 2008, a statue of Major-General Sir William Glasgow was erected at Post Office Square, with the statue of the Major-General facing ANZAC Square.

The Post Office Square parkland is a very popular picnic and lunch area for tourists and city workers who work in the area.