Roderic Stanley (Stan) Dallas, DSO, DSC & Bar (30 July 1891 – 1 June 1918) was an Australian fighter ace of World War I. His score of aerial victories is generally regarded as the second-highest by an Australian, after Robert Little, but there is considerable dispute over Dallas's exact total. While his official score is commonly given as 39, claim-by-claim analyses list as few as 32, and other research credits him with over 50, compared to Little's official tally of 47.