| Trinity College is located in the city of Perth, Western Australia.
The College is situated at the edge of the Central Business District of Perth on the banks of the Swan River.
Trinity's central location makes it easily accessible from all suburban areas.

In addition to Trinity's central city site, the College has an Outdoor Education site (Camp Kelly) located at Dwellingup, one hundred kilometres south of Perth.
Trinity College also has eighteen hectares of playing fields at Waterford (formerly called Manning).
This site is used for weekend PSA fixtures for winter and summer sport, and also for training during the week.

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