Australia has won their most medals in swimming, athletics, cycling, and rowing.
The record for most Athletics Olympic medals won was 19 medals by Michael Phelps in swimming at the 2012 London Olympic Games.
Mark Spitz won Seven Gold Medals
That is Michael Phelps of the United States who has won 16 Olympic medals (14 gold, 2 bronze).
Mark Spitz Luvbuneez10: I donno who it is but not Mark Spitz 'cos he won 7 olympic gold medals for swimming in 1972! No Offence...
Michael Phelps currently holds the world record for winning the most swimming medals. He has won 14 gold medals from swimming during the 2004 and 2008 Olympic games.