Iva Campbell Fallis (June 23, 1883 - March 7, 1956) was the second female Canadian Senator.

Born in Castleton, Ontario , she was the daughter of Jessie Stewart and Michael John Doyle. She attended the Toronto Normal School and became a school teacher. In 1909, she married Howard Taylor Fallis.

In 1923, she became the first president of the Peterborough Conservative Women's Association. She was vice president of the Canadian Conservative Party Association and a key member of the campaign team that helped elect R.B. Bennett Prime Minister of Canada in 1930. She was appointed to the Senate by Bennett in 1935 and was the second female Senator after Cairine Wilson. She served until her death in 1956.