Arcadia lies approximately 45 kilometres northwest of the Sydney central business district, presenting a semi-rural setting within the Hornsby Shire that remains accessible via the M1 Pacific Motorway.
The suburb had an estimated population of around 2,500 residents at the most recent census, with a high proportion of families and couples living on properties that range from acre‑sized lots to hobby farms.
The median age in the area is slightly above the state average, reflecting a mature community with a stable demographic profile.
Arcadia benefits from a rural-residential character, characterised by low urban density, drawing residents who prefer a blend of bushland outlook and suburban convenience.
Public transport in Arcadia includes the 637 bus route, which connects the suburb to Hornsby Station. This route links to ferry, train, and bus services across Greater Sydney.
School‑bus services also serve local private and public schools in nearby Galston and Dural.
Essential establishments near Arcadia include convenience stores and cafés in Galston village, approximately three kilometres to the north‑west, alongside medical centres and a supermarket.
The larger retail centres at Dural and Hornsby, both within a ten- to fifteen-minute drive, offer major supermarkets, banks, and specialist services.
Recreational activities centre around Arcadia Park and numerous bushwalking and mountain‑bike trails that weave through the surrounding Berowra Valley National Park.
Equestrian facilities and private tennis courts are common on local properties, while the proximity to Berowra Waters, about ten minutes by car, provides boating and waterfront leisure opportunities.
The Galston Gorge lookout to the north offers scenic outlooks and picnic areas that draw weekend visitors.
Arcadia maintains a semi‑rural lifestyle with direct access to natural reserves, contributing to an ambience that balances tranquillity with practical connectivity. Housing consists mainly of low‑density dwellings set on generous land parcels.
Local infrastructure supports a self-contained life, with community groups and rural fire service involvement drawing on the volunteer spirit of residents.