- 1st (100m freestyle) - 2012 National Championships (Adelaide, Australia)
- 1st (50m freestyle) - 2012 National Championships (Adelaide, Australia)
- 1st (100m freestyle) - 2011 World Championships (Shanghai, China)
- 1st (4x100m freestyle) - 2011 World Championships (Shanghai, China)
- 2nd (4x100m medley) - 2011 World Championships (Shanghai, China)
- 1st (100m freestyle) - 2011 National Championships (Sydney, Australia)
- 8th (50m freestyle) - 2011 National Championships (Sydney, Australia)
- Becoming World Champion in the 100m freestyle at the 2011 World Championships in Shanghai, China
- Winning the 100m freestyle at the 2011 National Championships
- Winning gold in the 4 x 100m freestyle relay at the Delhi 2010 Commonwealth Games
- James Magnussen shot to international fame in 2011 when he won the 100m freestyle at the World Championships in Shanghai. At 20 years of age, Magnussen won the race in 47.63 seconds and in doing so became the first Australian man to be crowned the 100m freestyle world champion in history. Earlier in the Championships, Magnussen had announced himself as one to watch when he led the Australian 4 x 100m freestyle relay team to gold.
- Magnussen contested the 50m and 100m freestyle at the 2012 Olympic selection trials, winning every heat, semi-final and final and setting two new personal best times along the way. His time of 47.10 in the 100m was the fourth fastest in history and the fastest in a textile suit, falling just shy of the 46.91s time set by Brazilian Cesar Cielo in the supersuit era.
- In London 2012, the young swimmer from Port Macquarie will attempt to break a 44-year Olympic gold medal drought in the 100m freestyle, with the last Australian man to win Olympic gold being Michael Wenden at Mexico City in 1968.
- Magnussen made his senior international debut in 2010 at the Delhi Commonwealth Games and Pan Pacs. Whilst he achieved medals in the 4 x 100m freestyle relays at both events, it was the individual events that inspired him to improve with the World Championships and Olympics as his goal.
- Magnussen has earned the nickname "The Missile" because of his amazing backend speed, coming from behind to win in the last 50m.
Years on national team
Brant Best (2010 - current)
Michael Mullens (2002 - 2009)
Primary Training Base
Sydney Olympic Park Aquatic Centre (NSW, Australia)
NSW Institute of Sport, Sydney
St Agnes Primary School Port Macquarie (NSW, Australia)
St Joseph's Regional Port Macquarie (NSW, Australia), Mackillop Senior College (NSW, Australia)
Bachelor of Sports Business - Australian College of Physical Education (2011 - )