Lugarno is a suburb in southern Sydney, in the state of New South Wales, Australia. Lugarno is located 23 kilometres south of the Sydney central business district in the local government area of the Georges River Council and is part of the St George area.
Situated on the northern bank of the Georges River, Lugarno is known for its large areas of bushland. Peakhurst and Peakhurst Heights, to the north, are the only adjacent suburbs. Nearby suburbs include Alfords Point, Illawong (on the other side of the Georges River), Padstow Heights (on the other side of Salt Pan Creek) and Oatley (on the other side of Lime Kiln Bay).