Greenwich is a suburb on the lower North Shore of Sydney, in the state of New South Wales, Australia. Greenwich is located 7 kilometres (4.3 mi) north-west of the Sydney central business district, in the local government area of the Municipality of Lane Cove.

The suburb occupies a peninsula on the northern side of Sydney Harbour, at the opening of the Lane Cove River. The suburb features harbour views, a few pockets of bushland, shops, restaurants and cafes, a harbour swimming pool with shark net.