Sir Reginald Hall | |
|---|---|
 Admiral Hall in 1919 | |
| Nickname(s) | Blinker |
| Born | 28 June 1870 Britford, Wiltshire |
| Died | 22 October 1943 (aged 73) |
| Allegiance |  United Kingdom / British Empire |
| Service |  Royal Navy |
| Years of service | 1884–1919 |
| Battles / wars | World War I |
| Awards | Knight Commander of the Order of St Michael and St George Companion of the Order of the Bath Order of the Rising Sun, Gold and Silver Star |
Admiral Sir William Reginald Hall KCMG CB (28 June 1870 – 22 October 1943), known as Blinker Hall, was the British Director of Naval Intelligence (DNI) from 1914 to 1919. Together with Sir Alfred Ewing he was responsible for the establishment of the Royal Navy's codebreaking operation, Room 40, which decoded the Zimmermann telegram, a major factor in the entry of the United States into World War I.