Herbert Whitmore Isaac (11 December 1899 – 26 April 1962) was an English cricketer who played three first-class games for Worcestershire in 1919 without any great success. None of these games were in the County Championship as Worcestershire did not re-enter this until the following season. Isaac attended Harrow School, and played for them against Eton College in 1917.In the 1920s and 1930s, he appeared a few times for Settlers v Officials in Kenyan minor matches.