Robert Walker Macbeth RA (30 September 1848 in Glasgow – 1 November 1910 in London) was a Scottish painter, etcher and watercolourist, specialising in pastoral landscape and the rustic genre. His father was the portrait painter Norman Macbeth and his niece Ann Macbeth. His younger brother Henry Macbeth, later Macbeth-Raeburn RA (1860–1947) was also an artist.
Macbeth studied in London, producing realistic everyday scenes and working for The Graphic magazine. He painted in the Lincolnshire and Somerset countryside, in works influenced by those of George Heming Mason and Frederick Walker. His The Cast Shoe was bought by the Chantrey Bequest in 1890, and is now at Tate Britain.
In 1895 he painted a mural Opening of the Royal Exchange by Her Majesty Queen Victoria, 28th October 1844 which can be seen in the Royal Exchange, London.
From 1871 Macbeth exhibited at the Royal Academy, Royal Society of Portrait Painters, Grosvenor Gallery, New Gallery and the Fine Art Society in London. There were also exhibitions in the regions at the Royal Birmingham Society of Artists in Birmingham, the Royal Scottish Academy in Edinburgh, the Royal Glasgow Institute of the Fine Arts, the Walker Art Gallery in Liverpool and Manchester Art Gallery.