Cataby is a small settlement approximately north of Perth, Western Australia on the Brand Highway. The area was once called West Dandaragan, with the town of Dandaragan located 17km to the east.

The Cataby Important Bird Area, which supports an important breeding population of the short-billed black cockatoo, lies 2km south-east of the town.

Tronox have a titanium mine site at Cooljarloo, near Cataby. Concentrate is transported by road train to the processing facility at Chandala, near Muchea.

The area has also been explored for mineral sands.

The town was threatened by a bushfire in 2010, which closed the Brand Highway for a few hours; the fire was contained shortly afterward.

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