Sir Arthur Robinson KCMG (23 April 1872 – 17 May 1945) was an Australian politician.
Robinson was born at Carlton, Victoria, the son of journalist Anthony Bennett Robinson and Harriet, née Barton, the sister of Sir Edmund Barton. He attended Scotch College (where he was later Chairman of the School Council) before studying law at the University of Melbourne. He became a barrister and solicitor in 1896, partnering William Bruce in the firm that was to become Arthur Robinson & Co. Robinson became known as a free trader and a conservative (in contrast to his uncle Edmund Barton), but he was also an ardent federalist. On 18 April 1899 he married Annie Summers Puckle at Malvern.
Robinson was elected to the Victorian Legislative Assembly in 1900 for the seat of Dundas, but was defeated in 1902. Subsequently, he entered the Australian House of Representatives as the Free Trade member for Wannon in 1903, succeeding Samuel Cooke. He was defeated in 1906 by Labour, which ran a successful campaign focussing on his opposition to aspects relating to unionism in the Conciliation and Arbitration Act. Returning to state politics, he was elected to the Victorian Legislative Council in 1912 and held his seat until his retirement in 1925, holding ministerial positions in the governments of Sir Alexander Peacock and Sir Harry Lawson.