Parramatta High School is a government-funded co-educational dual modality partially academically selective and comprehensive secondary day school, located on the Great Western Highway in the central business district of Parramatta, a western suburb of Sydney, New South Wales, Australia.

Parramatta is a satellite city of Sydney, Australia's largest city and the capital of New South Wales. It is the primary central business district (CBD) for Greater Western Sydney, located approximately 24 kilometres (15 mi) west of Central Sydney, on the banks of the Parramatta River.