Asquith is a suburb in Sydney’s Eastern Suburbs in the state of New South Wales, Australia. Asquith is located 26 km north-west of the Sydney central business district, in the local government area of Hornsby Shire. The suburb contains a section of Ku-ring-gai Chase National Park on its eastern side.

According to the 2021 census of population, there were 6,160 residents in Asquith. 50.1% of people were born in Australia. The next most common countries of birth were India 7.8%, China 7.5% and Philippines 3.4%. 52.8% of people spoke only English at home. Other languages spoken at home included Mandarin at 9.3%. The most common responses for religious affiliation were No Religion 36.5%, Catholic 18.0% and Hinduism 11.1%.

Asquith railway station is on the T9 Northern and T1 North Shore and Central Coast & Newcastle Lines. Hornsby Maintenance Depot is located within the suburb. CDC NSW bus route 592, 595, 597 and 598 to and from Hornsby railway station serves Asquith.