The Lane Cove National Park is a protected national park that is located within metropolitan Sydney, in New South Wales, Australia. The 670-hectare (1,700-acre) national park is situated about 10 kilometres (6.2 mi) north-west of the Sydney central business district and features various vegetation types, such as, wet and dry sclerophyll forest, heathland, mangroves and tidal flats. The park consists of land near the banks of the Lane Cove River, which flows generally south-east into Sydney Harbour. It also extends to the outskirts of Pennant Hills and Wahroonga at its northern boundaries.

The Lane Cove River, a northern tributary of the Parramatta River, is a tide-dominated, drowned valley estuary west of Sydney Harbour, located in Sydney, New South Wales, Australia. The river winds through a bushland valley and joins Parramatta River at Greenwich and Woolwich, where together they form an arm of Sydney Harbour, and serves as a border along with Middle Harbour separating Sydney's North Shore.