Sir Arthur Robinson KCMG (23 April 1872 – 17 May 1945) was an Australian politician, at different times a member of the upper and lower houses of the Victorian parliament and a federal MP.

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 for Melbourne South Province 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, including as Solicitor-General (21 March 1918 – 20 January 1920),[4] Attorney-General (21 October 1919 – 10 July 1924) and a concurrent appointment as Solicitor-General (20 September 1920 – 11 July 1924).

[5][6] Robinson was significantly involved in the State Electricity Commission, supporting Sir John Monash in its establishment.

[1] Following his retirement in 1925, Robinson attempted to re-enter the federal House of Representatives as the Nationalist candidate for Fawkner, but was defeated by his friend George Maxwell, who was elected as an independent.