Cathedral Square, Perth

Cathedral Square is the block in the central business district of Perth, Western Australia bounded by Hay Street to the north, Pier Street to the east, St Georges Terrace to the south, and Barrack Street to the west. Located within that block is the eponymous St George's Cathedral as well as other significant structures in Perth's history.

Earlier names for the block included simply the names of Barrack Street and Pier Street, Cathedral and Treasury precinct and more recently Cathedral Precinct.

The newer name of Cathedral Square is used by the Anglican Cathedral administration, as well the promoters of the newer and heritage buildings within the area, describing it as "the historic heart of Perth".