Cathedral Avenue is a short lane situated in Perth between St Georges Terrace and Hay Street east of Barrack Street within the Cathedral Square precinct.

Sometimes it was shown as St George's Avenue.

[2] Cathedral Avenue operates as an access route to both the Treasury Buildings and to St George's Cathedral for formal functions.

[3][4][5] The Hay Street end was gated in the late 1920s.

[7][8][9] Drunk and disorderly behaviour was an issue over time in the street.