Roy Lindsay Kellock, CC (November 12, 1893 – December 12, 1975) was a Canadian Justice of the Supreme Court of Canada. Born in Perth, Ontario, he graduated from McMaster University with a B.A. in 1915. Kellock was called to bar in 1920 and practised with the firm of WeirFoulds in Toronto. In 1970, he was made a Companion of the Order of Canada.