Arcadia is a semi-rural suburb of Sydney, in the
state of New South Wales, Australia 42 kilometres
north-west of the Sydney central business district
in the local government area of Hornsby Shire.
Arcadia is in the Upper North Shore region.

According to the 2011 census of Population,of
Arcadia were 1,305 residents in Arcadia.
79.3% of residents were born in Australia.

Arcadia is a semi-rural suburb. Other commercial
developments are restricted to horticulture,
stables, 'pet nannies' and fruit/vegetable produce.