Lindsay Gordon Riches, CMG (18 February 1904 – 7 June 1972) was a South Australian politician.
He was a Labor Party member of the South Australian House of Assembly from 1933 to 1970, representing the electorates of Newcastle (1933-1938) and Stuart (1938-1970).
He was Speaker of the South Australian House of Assembly from 1965 to 1968 under Frank Walsh and Don Dunstan.
[3] He was born at Mundalla, near Tatiara, and was educated at Bordertown Public School.
He moved to Port Augusta to work for the Transcontinental in 1924, and took over the operation of that newspaper in 1927, serving as editor.