Robert John Day {'1': ", '2': ", '3': ", '4': "} (born 5 July 1952) is an Australian former politician and businessman who was a Senator for South Australia from 1 July 2014 to 1 November 2016. He is a former federal chairman of the Family First Party. Before entering politics, he worked in the housing industry, owning several businesses, and at one stage serving as president of the Housing Industry Association.