The 2018 Sandown 500 (known for sponsorship purposes as the 2018 Rabble.club Sandown 500) was a motor racing event for Supercars, held on the weekend of 14 to 16 September 2018. The event was held at Sandown Raceway in Melbourne, Victoria, Australia and consisted of one race, 500 kilometres in length. It was the twelfth event of sixteen in the 2018 Supercars Championship and hosted Race 24 of the series. It was also the first event of the 2018 Enduro Cup. The race was won by Jamie Whincup and Paul Dumbrell driving a Holden Commodore ZB.