Chatswood is a suburb in the Lower North Shore of Sydney, in the state of New South Wales, Australia, 10 kilometres north of the Sydney central business district. It is the administrative centre of the local government area of the City of Willoughby.

In the 2021 Australian census, the total population of Chatswood was 25,553; 12,184 (47.7%) were male and 13,371 (52.3%) were female. 34.4% of all residents were born in Australia. The most common non-Australian countries and regions of birth were China (20.1%), Hong Kong (5.5%), South Korea (4.3%), India (4.0%) and Japan (2.5%). 34.8% of people only spoke English at home. Other languages spoken at home included Mandarin (23.3%), Cantonese (12.3%), Korean (4.8%), Japanese (3.0%) and Hindi (1.9%).

Chatswood railway station is served by the North Shore railway line on the Sydney Trains network. Southbound rail services run to Central before continuing to the western suburbs. Northbound rail services run to Hornsby and some peak hour services run to Gosford and Wyong. Before the conversion of the Epping to Chatswood railway line (opened in 2009) to part of the metro network, Chatswood station served as a junction between that line and the North Shore railway line.