Sir Robert Wallace Best, KCMG (18 June 1856 – 27 March 1946) was an Australian lawyer and politician who served in both the Senate and the House of Representatives.

[1] In April 1889, Best was elected to the Victorian Legislative Assembly as the member for Fitzroy (later subsumed by the seat of Richmond) and was offered, but turned down, a position in William Shiels' ministry in 1892.

[3] He was Vice-President of the Executive Council and Leader of the Government in the Senate from February 1907 until November 1908 in the third Deakin Ministry, where he was responsible for tariff and excise bills.

He served as Minister for Trade and Customs in Alfred Deakin's Fusion ministry from June 1909 to April 1910.

At the 1922 election, he was beaten narrowly on Labor preferences by John Latham, who ran as an independent on the slogan, "Get Rid of Hughes".

[1] His second daughter Phyllis Best was an actress who toured with Dame Sybil Thorndike and married fellow actor and radio personality Atholl Fleming.