Theodore Hall
- Born
- 20 October 1925 (74 years old)
- Passed away
- 1 November 1999
- Place of birth
- New York, New York, USA
- Gender
- Male
Theodore "Ted" Hall was an American physicist and an atomic spy who passed along detailed information about the implosion-type "Fat Man" bomb and several processes for purifying plutonium to the Soviet Union.