Major General Kenneth David Nichols (13 November 1907 – 21 February 2000), also known by Nick, was an officer in the United States Army, and a civil engineer who is notable for his classified works in the Manhattan Project, which developed the atomic bomb during World War II, as Deputy District Engineer to James C. Marshall, and from 13 August 1943 as the District Engineer of the Manhattan Engineer District. He was responsible for both the uranium production facility at the Clinton Engineer Works at Oak Ridge, Tennessee, and the plutonium production facility at Hanford Engineer Works in Washington State.