- For other meanings of "Sydney", see Sydney (disambiguation).
Sydney was a city in Australia on Earth.
Constellation's Captain Mike Walsh hated transporters after an accident dumped him into Sydney Harbour. (TOS novel: My Enemy, My Ally)
Starfleet cadets Tim Sinclair and Jean Brennan had their first date in Australia, at Sydney Harbour. (Star Trek: Pendragon: "Children of the Burning Heart")
The Federation starships USS Sydney have been named after the city.