New South Wales

 was a state in Australia that both Simon Griffiths and Nate Simms called home. Cities or towns in the state included Sydney and its suburbs Parramatta and Glebe, along with Castle Hill. At least part of its southern border with Victoria was defined by the Snowy Mountains, which Simms once visited whilst lodging at Jindabyne. Polly Wright spent some time in the state. (PROSE: Invasion of the Cat-People)

The Eleventh Doctor, Kazran Sardick and Abigail Pettigrew also visited the state and had their picture taken in front of the state's signature landmark, the Sydney Opera House. (TV: A Christmas Carol)

In 1932, the Doctor, some time before his fifth incarnation, took five wickets for New South Wales, for which Donald Bradman played, at a cricket test. (TV: Four to Doomsday)

In 2017, the Doctor, along with companion Bill Potts, travelled to Sydney Harbour to escape from the girl, which is a sentient body of fluid, taking the shape of Bill's friend Heather. Thinking they've lost her, they retreat into a bathroom to refresh themselves. But after Bill sees Heather's eye in the sink, the Doctor enters into a Sydney restaurant yelling "Shark Attack", to which all the people in the restaurant flee. (TV: The Pilot)