Keith Alexander Laught (2 June 1907 – 13 May 1969) was an Australian politician. Born in Adelaide, South Australia, he was educated at Scotch College and then the University of Adelaide, becoming a barrister in 1929. He served in the military 1940-1944. In 1951, he was elected to the Australian Senate as a Liberal Senator for South Australia. He held the seat until his death in 1969; Martin Cameron was appointed to fill the vacancy.