Robert Barr Smith (4 February 1824 – 20 November 1915) was an Australian businessman and philanthropist. Smith was born at Lochwinnoch, Renfrewshire, Scotland, the son of the Rev. Dr Robert Smith, a Church of Scotland minister, and his wife Marjory, née Barr. Smith also took up land and became a large owner in South Australia, Victoria, New South Wales and Queensland. When the Wallaroo and Moonta copper mines got into difficulties, Elder Smith and Company made large advances to them until more profitable times came.