Matthew Grevers (born March 26, 1985) is a former American competition swimmer who competed in the backstroke and freestyle events, and is a six-time Olympic medalist.

He has won a total of thirty-three medals in major international competition, fourteen gold, twelve silver, and seven bronze spanning the Olympics, World Championships, and the Universiade.

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.

[7][8][9] At the 2009 World Aquatics Championships, Grevers was part of the U.S. men's 4×100-meter freestyle relay team who took the gold ahead of Russia and 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.

[16] In his final event, the 4×100-meter medley relay, Grevers won gold with Brendan Hansen, Michael Phelps and Nathan Adrian.

On the first night of swimming, Grevers missed the top-eight championship finals roster in the 50-meter butterfly, as he finished his semi-final run with a twelfth-place time in 23.35.

[17] The following day, Grevers threw down the event's fastest time of 52.93 to claim the gold medal in the 100 m backstroke, finishing ahead of his teammate David Plummer by nearly two-tenths of a second.

[20][21] Nearly an hour later, Grevers teamed up with Kevin Cordes, Ryan Lochte, and Nathan Adrian for the final in the 4 × 100 m medley relay.

At the 2017 World Aquatics Championships in Budapest, Grevers placed second behind Xu Jiayu of China but ahead of Murphy in the 100-meter backstroke.

[25]As noted previously, he graduated from Lake Forest High School in 2003, and subsequently attended Northwestern University while swimming for the Wildcats.

Grevers considered representing the Netherlands and even spoke about it with Dutch swimming legend Pieter van den Hoogenband.