USA under Sommer-OL 2012

USA deltok under Sommer-OL 2012 i London som ble arrangert i perioden 27. juli til 12. august 2012. Femhundretrettini utøvere deltok i tjuefem sporter, det vil si alle unntatt håndball. Det var tjuesjette gangen USA deltok i et sommer-OL, de har deltatt i alle unntatt OL 1980 i Moskva. USA ble beste nasjon med førtiseks gull-, tjueni sølv- og tjueni bronsemedaljer. Fekteren Mariel Zagunis var landets flaggbærer under åpningsseremonien.
The United States will be represented in two out of the five badminton events: men's doubles and women's singles. No American has ever medaled in badminton since it became an Olympic sport in 1992.
The United States has qualified both a men's and a women's team.
The United States men's team's group stage game against Nigeria set new Olympic records for most points scored in a half (78, set in the first half and equaled in the second) and for a full game (156).
The United States has qualified boxers for the following events:
– Spence initially lost the bout 11–13 but successfully appealed on the grounds that the referee called too few cautions for holding fouls and Spence should have been awarded at least four more points
The United States has qualified three individual athletes, one man and two women, and a women's team.
The United States has qualified wrestlers in all events except the 96 kg Greco-Roman classification.
Key:
The United States has qualified three archers for the men's individual event, three archers for the women's individual event and teams for both the men's team event and women's team event.
The United States has qualified 20 fencers to compete in all fencing events.
The United States has qualified a women's soccer team after finishing in first place at the 2012 CONCACAF Women's Olympic Qualifying Tournament.
American athletes have the qualifying standards in the following track and field events (up to a maximum of 3 athletes in each event at the 'A' Standard, and 1 at the 'B' Standard): The team was selected based on the results of the 2012 United States Olympic Trials.
The United States has qualified teams in the dressage and eventing team competitions. and also qualified a team in the jumping team competition.
They have also qualified 4 athletes in the individual dressage competition, 5 athletes in the individual eventing competition, and 4 athletes in the individual jumping competition.
The United States has qualified three men and two women.
The United States has qualified a women's team for the London Games by winning the 2011 Pan American Games. The men's team failed to qualify.
The United States has qualified three athletes to compete in the modern pentathlon event. Dennis Bowsher and Margaux Isaksen have qualified through the 2011 Pan American Games.
United States has qualified boats for the following events
The United States has qualified boats in three out of twelve sprint events, one men's and one women's. The United States has not medaled in Olympic sprint canoeing since 1992.
Qualification Legend: Q = Qualify to semi-final on position in heat; q = Qualify to semi-final on time; FA = Qualify to final (medal); FB = Qualify to non-final (medal)
The United States has qualified the following boats.
Qualification Legend: FA=Final A (medal); FB=Final B (non-medal); FC=Final C (non-medal); FD=Final D (non-medal); FE=Final E (non-medal); FF=Final F (non-medal); SA/B=Semifinals A/B; SC/D=Semifinals C/D; SE/F=Semifinals E/F; QF=Quarterfinals; R=Repechage
The United States has qualified one boat for each of the following events.
– Classification races for 5th through 8th place were cancelled due to lack of wind and round robin standings were used to determine ranks.
BFD = Black flag disqualification; EL = Eliminated – Gikk ikke videre to medal race; M = Medal race; OCS = On course side of start line at starting signal;
The United States has qualified twenty athletes to compete in thirteen shooting events.
The United States has qualified for eight individual diving spots at the 2012 Olympic Games.
3 US synchronized diving teams qualified through the 2012 FINA Diving World Cup and the rest of the divers qualified for the Olympics through the 2012 U.S. Olympic Trials for diving.
U.S. swimmers have qualifying standards in the following events (up to a maximum of 2 swimmers in each event at the Olympic Qualifying Time (OQT), and 1 at the Olympic Selection Time (OST)): Swimmers qualified at the 2012 U.S. Olympic Trials (for pool events).
The U.S. swimming team consists of 49 swimmers (24 men and 25 women). The oldest swimmer on the team is Jason Lezak at 36-years-old, and the youngest is Katie Ledecky at 15-years-old. The only siblings on the swim team are Haley Anderson and Alyssa Anderson. USA Swimming named Brendan Hansen, Natalie Coughlin, Peter Vanderkaay, Rebecca Soni, and Lezak as the team's captains.
Qualifiers for the latter rounds (Q) of all events were decided on a time only basis, therefore positions shown are overall results versus competitors in all heats.
Qualifiers for the latter rounds (Q) of all events were decided on a time only basis, therefore positions shown are overall results versus competitors in all heats.
– Indicates athlete swam in the preliminaries but not in the final race.
United States has so far qualified cyclists for the following events
United States has qualified 1 duet in synchronized swimming.
The United States has qualified 2 men and 2 women.
The United States Tennis Association nominated six male and six female tennis players to compete in the tennis tournament.
The United States qualified two men and three women to compete in the triathlon event.
*Aliya Mustafina and Aly Raisman finished with the same total score of 59.566. In the case of a tie, the sum of the three highest apparatus scores is used. These sums were 45.933 for Mustafina and 45.366 for Raisman (both dropping their Beam score), earning Mustafina the bronze medal.
The United States has qualified one athlete for the individual all-around competition.
The United States has qualified one man and one woman gymnast for the trampoline competition.
The United States has qualified both men's and women's teams by winning the water polo event at the 2011 Pan American Games.
The United States has qualified three athletes.
United States has qualified both a men's and women's team for the indoor tournaments.