Matthew Grevers (born March 26, 1985) is an American competition swimmer who competes in the backstroke and freestyle events, and is a six-time Olympic medalist. He has won a total of twenty medals in major international competition, ten gold, seven silver, and three bronze spanning the Olympics, World Championships, and the Universiade. At the 2008 Summer Olympics, Grevers won gold medals as a member of the 4×100-meter freestyle and 4×100-meter medley relay, and a silver medal in the 100-meter backstroke. Four years later at the 2012 Summer Olympics, he won a gold in the 100-meter backstroke.

Personal life
Grevers was born in Lake Forest, Illinois. He graduated from Lake Forest High School, and then attended Northwestern University in Evanston, Illinois, and swam for the Northwestern Wildcatsswimming and diving team.

Both of Grevers' parents are from the Netherlands. Grevers considered representing the Netherlands and even spoke about it with Dutch swimming legend Pieter van den Hoogenband. Ultimately, he decided to represent the United States.

Grevers proposed to his fiancée, Annie Chandler, at the Missouri Grand Prix on Saturday February 11, 2012.

Swimming career
At the 2008 Summer Olympics in Beijing, Grevers won two gold medals by swimming in the preliminary heats of the 4x100-meter freestyle relay and 4x100-meter medley relay (swimming the backstroke leg) as the Americans went on to win the finals in those events and medals are awarded to participants at any step along the way. Grevers also won an individual silver medal in the 100-meter backstroke in a time of 53.11 second, 0.57 of a second behind the winner, world record holder Aaron Peirsol.

At the 2009 World Aquatics Championships, Grevers was part of U.S. men's 4x100-meter freestyle relay team who took the gold ahead of Russia and France. Grevers also earned a gold in the 4x100-meter medley relay for his contributions in the heats.

2012 Summer Olympic Games 
See also: Swimming at the 2012 Summer Olympics
At the 2012 United States Olympic Trials, the qualifying meet for the 2012 Olympics, Grevers qualified for the U.S. Olympic team by finishing first in the 100-meter backstroke and third in the 100-meter freestyle. In the final of the 100-meter backstroke, Grevers won in a time of 52.08 seconds, the second-best effort of all time and just behind Aaron Peirsol's world record of 51.94. In the 100-meter freestyle, Grevers placed third with a time of 48.55, which ensured him a spot on the 4x100-meter freestyle relay. Grevers also competed in the 50-meter freestyle, and placed sixth in the final with a time of 22.09.

At the 2012 Summer Olympics in London, Grevers won a total of three medals: two golds and one silver. Grevers earned his first medal, a silver, by swimming for the second-place U.S. team in the preliminary heats of the 4×100-meter freestyle relay. In the final, the American team finished second behind France. Teaming with Jimmy Feigen, Ricky Berens, and Jason Lezak in the heats, Grevers swam the second leg and recorded a time of 47.59. After leading the heats (52.92) and semifinals (52.66) of the 100-meter backstroke, Grevers won gold in the final of the 100-meter backstroke with a time of 52.16, bettering Aaron Peirsol's Olympic record of 52.54 set in 2008 and 0.76 s ahead of Nick Thoman. For Grevers, it was his first individual gold medal. In his final event, the 4×100-meter medley relay, Grevers won gold with Brendan Hansen, Michael Phelps and Nathan Adrian. Swimming the backstroke leg, Grevers recorded a time of 52.58 seconds, and the U.S. team went on to win with a time of 3:29.35.