Robert Samuel Ross (5 January 1873 – 24 September 1931) was an Australian socialist journalist, trade unionist, and agitator best known as the editor of a series of political magazines associated with the Australian labour movement in the 1890s and early 1900s. Ross' political views were drastically moderated during the 1920s. His contributions to Australian political life ended with his death as a respected member of the Australian Labor Party in 1931.