Val Fitch (1923-2015) was a Nobel-Prize-winning American physicist.

Fitch was drafted into the Special Engineer Detachment in 1943. He was sent to Los Alamos, where he worked with Ernest Titterton on signals for the detonation of the "Gadget" in the Trinity test. He was also sent to Wendover to observe the dummy bomb tests.

Fitch won the Nobel Prize in Physics in 1980 "for the discovery of violations of fundamental symmetry principles in the decay of neutral K-mesons."