|Competitor for Great Britain|
|2000 Sydney||Finn class|
|2008 Beijing||Star class|
|2012 London||Star class|
|2002 Los Angeles||Star class|
|2003 Cadiz||Star class|
|2004 Gaeta||Star class|
|2005 Buenos Aires||Star class|
|2007 Cascais||Star class|
|2010 Rio De Janeiro||Star class|
|2012 Hyeres||Star class|
|2009 Kiel||Star class|
He competed in the 2004 Summer Olympics in Athens and finished 6th in the double-handed Star class with Steve Mitchell. The same team received a bronze medal at the 2005 World Championships and a gold medal at the 2005 European Championships.
Percy won World Bronze in the Star Class with Andrew Simpson in 2007 and European Championship Gold in 2009. The duo have just won Gold in the same class of boat at the 2010 World Championships which took place in Brazil. With previous partner, Steve Mitchell, Percy won the 2002 Star World Championships in Los Angeles, and medalled in the next 3 world championships, winning the Bronze medal in each of them.
At the 2008 Olympics in Beijing he again won a gold medal, this time in the Star class, teaming up with Andrew Simpson. At the 2012 Olympics in London he and Andrew Simpson won the silver medal, after a tight race against Swedish duo Fredrik Lööf and Max Salminen. Percy is a member of Hayling Island Sailing Club and sails there regularly.
In 2005, Iain decided to take a break from full-time Olympic Class sailing and join America’s Cup challenger +39 Challenge as helmsman. Due to limited funding, +39 only managed ninth place in the Louis Vuitton Cup. Iain then joined Great Britain’s TEAMORIGIN competing in the Louis Vuitton Trophy regattas (Nice, Auckland, La Maddalena) and on the TP52 circuit, prior to stepping onboard Artemis Racing for the Louis Vuitton Trophy – Dubai.
Percy has been with Artemis Racing since then and is now Sailing Team Director for the Challenger of Record for the 34th America's Cup which will be held in San Francisco, California during the summer of 2013.
Percy was appointed Member of the Order of the British Empire (MBE) in 2005, as a recognition of his Olympic gold medal. He was appointed Officer of the Order of the British Empire (OBE) in the 2009 New Year Honours.
- Profile: "Iain Percy"– databaseOlympics.com (Retrieved 31 December 2007)
- "Iain Percy MBE" – British Olympic Association (Retrieved 21 March 2008)
- "Iain Percy Sailing Greats" – olympics30.com (Retrieved 11 Feb 2012)
- "GB sailors take Star gold medal". BBC. 21 August 2008. Retrieved 21 August 2008.
- The London Gazette: . 31 December 2008.