David Henry Frisch (March 12, 1918 – May 23, 1991) was an American physicist who helped develop the atom bomb in World War II and later became active in the disarmament movement.

Born in New York, Frisch grew up in San Antonio and graduated from Princeton in 1940.

He was the recipient of Fulbright, Guggenheim, Alfred P. Sloan and National Science Foundation research fellowships.

Among his scientific publications was a 1963 paper in which he and James H. Smith succeeded in showing objective time dilation in the decay of cosmic muons.

A thirty-five-minute movie describing this experiment performed both on the top of Mount Washington in New Hampshire as well as at MIT is available online.