Conor James Dwyer (born January 10, 1989) is an American competition swimmer and Olympic gold medalist. He competes in freestyle and medley events, and won a gold medal as a member of the winning U.S. 4×200-meter freestyle relay team at the 2012 Summer Olympics. In total, he has won seventeen medals in major international competitions: nine gold, six silver, and two bronze spanning the Summer Olympics, the FINA World Championships, the Pan Pacific Championships, and the Pan American Games. Dwyer placed second at the 2016 US Olympic Swimming Trials in the 400m freestyle.
Dwyer was born in Evanston, Illinois, the son of Patrick and Jeanne Dwyer. His mother was an All-American swimmer for the Florida State Seminoles swimming team. Dwyer is the second oldest of five children in his family.
He grew up in Winnetka, Illinois, and attended Loyola Academy, a Catholic high school in Wilmette, Illinois, where he swam for the Loyola Academy Ramblers high school swim team for four years. As a senior team captain, he was the league champion in the 200-yard freestyle (1:44.03) and runner-up in 500-yard freestyle (4:45.15), received all-section and all-league honors, and was his team's most valuable swimmer. In addition to swimming, he played baseball, lacrosse and water polo. In water polo, he earned third-team all-state and first-team all-section, all-region and all-league honors. He graduated from Loyola in 2007.