The 2011 Trading Post Perth Challenge was a motor race for the Australian sedan-based V8 Supercars racing cars. The Trading Post Perth Challenge was the fourth event of the 2011 International V8 Supercars Championship. It was the 34th time a motor racing event held at Barbagallo Raceway had contributed to the Australian Touring Car Championship and its successors. It was held on the weekend of April 29 to May 1 at Barbagallo Raceway, near Wanneroo, just outside Perth, Western Australia.