Dagny Knutson

At the 2011 World Aquatics Championships in Shanghai, Knutson won a gold medal in the 4×200-meter freestyle relay with Missy Franklin, Katie Hoff, and Allison Schmitt, with the team finishing ahead of Australia and China. As the second leg, Knutson had a 1:57.18 split.

At the 2010 National Championships, Knutson did not qualify to swim in any individual events at the 2010 Pan Pacific Swimming Championships. Knutson placed 4th in the 400 m freestyle, 5th in the 200 m freestyle, 6th in the 400 m individual medley, and 19th in the 200 m butterfly.

At the 2009 National Championships, Knutson qualified to swim in the 4x200 m freestyle relay at the 2009 World Aquatics Championships in Rome by placing fifth in the 200 m freestyle. In Rome, Knutson swam in the heats of the 4x200 m freestyle relay (with Ariana Kukors, Alyssa Anderson, and Lacey Nymeyer) and won a silver medal after the United States placed second in the finals. As the second leg, Knutson had a 1:57.73 split.

At the 2008 FINA Youth World Swimming Championships, Knutson won a total of five medals, all of them gold. At the 2008 Short Course Nationals, Knutson broke Katie Hoff's American record in the 400-yard individual medley with a time of 4:00.62, a record which has since been broken by Julia Smit. At the 2009 Junior Pac Pacs, she set five meet records while winning seven gold medals and a bronze.

Dagny Knutson (born January 18, 1992) is an American swimmer of Norwegian heritage. Knutson is a former American record holder in 400-yard individual medley and holds several high school national records. She finished swimming competitively in 2012 and in 2013, due to her struggles with bulimia and financial strains.