Sinéad C. Russell (born June 15, 1993) is a Canadian competition swimmer from Burlington, Ontario who swam for the Oakville Dolphins swim club in Oakville, Ontario. In March 2012, Russell competed at the 2012 Canadian Olympic swim trials in Montreal, where she qualified for two events, the 100 metre backstroke and the 200 metre backstroke. At the 2012 Summer Olympics in the women's 100-metre backstroke, Russell finished in 13th place in the heats and qualified for the semifinals, but did not secure a place in the finals. In the 200-metre backstroke heats, Russell touched the wall third in her heat and advanced to the semifinals. In the semifinals, Russell was in first position after the first length, touching the wall before eventual gold medal winner Missy Franklin but lost speed and touched the wall third with a time of 2:08.76, which was still enough to qualify her for the 8th and final spot in the final. In the final, Russell finished 8th with a time of 2:09.86.