 Swimming featured 34 events (17 male, 17 female), including two 10 km open-water marathons in Hyde Park's Serpentine Lake.The remaining 32 were contested in a 50 m long course pool within the Olympic Park.United States claimed a total of 31 medals (16 golds, 9 silver, and 6 bronze) in the leaderboard to maintain its supremacy as the most successful nation in swimming.