Richard Norton "Dick" Tufeld (December 11, 1926 -- January 22, 2012) was an American actor, announcer, narrator and voice actor from the late 1940s until the early 21st century. He was a well-known presence on television as an announcer, but his most famous role as the Robot in the television series, Lost in Space.

Answer this question: who voiced the robot in lost in space? Let's think fast. Stream of consciousness:
The relevant information is: He was a well-known presence on television as an announcer, but his most famous role as the Robot in the television series, Lost in Space. So the final answer is '' Dick '' Tufeld.