Kurnell is a suburb in Sydney, in the state of New South Wales, Australia. It is 21.4 kilometres (13.3 mi) south of the Sydney central business district, in the local government area of the Sutherland Shire along the east coast.
Kurnell is on the south eastern headland of Botany Bay. Cronulla and Woolooware are the only adjacent suburbs. La Perouse is located opposite, on the northern headland of Botany Bay.
The eastern side of the peninsula is part of Botany Bay National Park. Towra Point Nature Reserve is located on the western side of the suburb.