Graham Smith, Canadian swimmer
Donald Graham Smith (born May 9, 1958) is a Canadian former competition swimmer who won a silver medal in the men's 4x100-metre medley relay at the 1976 Summer Olympics in Montreal, Quebec. He did so alongside teammates Stephen Pickell, Clay Evans and Gary MacDonald. His brother George and sister Becky also competed in swimming.

At the 1978 Commonwealth Games in Edmonton, Alberta, he became the first competitor to win six gold medals at a single Commonwealth Games; he won the 100- and 200-metre breaststroke, 200- and 400-metre individual medleys, and was part of the winning 4x100-metre freestyle and 4x100-metre medley relay teams. Smith twice broke the world record in the men's 200-metre individual medley (long course).

He also won an NCAA national swimming championship at the University of California, Berkeley.

Smith was inducted into the Alberta Sports Hall of Fame and Museum in 1978.