General Sir John Tredinnick Crocker, (4 January 1896 – 9 March 1963) was a senior British Army officer who fought in both world wars. He served as both a private soldier and a junior officer in the First World War, and as a distinguished brigade, division and corps commander during the Second World War, where his most notable role was as General Officer Commanding (GOC) of I Corps during the D-Day landings on 6 June 1944, leading the corps throughout the subsequent campaign in Western Europe until Victory in Europe Day (VE-Day) just over eleven months later.