Arthur Whitmore Isaac (4 October 1873 – 7 July 1916) was an English first-class cricketer: a right-handed batsman who played a number of times, though with only modest success, for Worcestershire in their early seasons in first-class cricket. He was also a member of the Club Committee, and spent a period as its treasurer. Isaac played his last first-class game for Worcestershire in 1911, but two years later made one final first-class appearance, for HK Foster's XI against Oxford University. He died in World War I, at Contalmaison, France, at the age of 42.