Colin Stephen de Grussa (born 17 April 1973) is an Australian politician. He was elected to the Western Australian Legislative Council at the 2017 state election, as a National Party member in Agricultural Region. His term began on 22 May 2017. Prior to this election, de Grussa worked in sales and support for a large computer wholesaler, before undertaking an Associate Degree in Agriculture at Muresk Institute and returning to the family farm. De Grussa was the state president of the National Party from 2013 to 2015.