William Gregory Curran (birth details unknown; died 24 December 1921 at New South Wales) was a cricket Test match umpire. He umpired two Test matches, making his debut in the match between Australia and South Africa, the first match between these nations in Australia, played at Sydney on 9 December to 14 December 1910. Australia won comfortably by an innings, scoring 6 for 494 on the first day, the then highest number of runs by one side in a day. Curran’s other match was between Australia and England, played at Sydney on 15 December to 21 December 1911. This was won by Australia with Victor Trumper scoring a record eighth century, and 'Ranji' Hordern taking 12 wickets on debut against England. Johnnie Moyes, who played during his era, describes him as "little Billy Curran of Sydney, who, we thought, had a perfect horror of giving batsmen out leg-before-wicket." Only two LBW decisions were given in his two Test matches – perhaps both were given by Bob Crockett, Curran’s colleague on both occasions!