Ashton Charles Agar (born 14 October 1993) is an Australian cricketer who plays all forms of the game at international level. Agar plays domestically for Western Australia and the Perth Scorchers. A left-handed spin bowler, he played two Test matches for the Australian national side during the 2013 Ashes series.
Agar was born in Melbourne, to a Sri Lankan mother and an Australian father, and has two younger brothers, Will and Wes. He attended Melbourne's De La Salle College, graduating in 2011.
He represented Victoria at both under-17 and under-19 level. After good form at the 2010–11 National Under-17 Championships, where he took 16 wickets at an average of 11.75 bowling left-arm orthodox spin, he was selected to play for the Australian under-19s for a series against the West Indies under-19s in the United Arab Emirates. Making his debut at the age of 17, Agar went on to play one under-19 Test and ten under-19 One Day International (ODI) matches for Australia. At the 2012 Under-19 World Cup, he was named in the squad as Australia's second spinner behind Ashton Turner, but did not play a match at the tournament.