Emily Pia Halliday (born 5 April 1979)[1] is a former Australian field hockey player.

[2] Halliday played as a defender, and competed in the 2004 and 2008 Summer Olympics, in Athens and Beijing, respectively.

[4] That same year, she medalled with the Australian team twice, winning gold at the Oceania Cup and bronze at the Champions Trophy.

[5] At the 2003 Champions Trophy, Halliday won her first gold medal at a major international tournament.

The most prolific year in Halliday's career was 2006, when she won gold and silver medals at the Commonwealth Games and World Cup respectively.