Austinmer is a residential and parkland area, thought to be named after Henry Austin, a Director of the Board of the Illawarra Mining Company. It was previously known as Sidmouth, North Bulli and Austermere. Austinmer is bounded by Lady Fuller Park, Wards Creek, the railway line and the locality of Coledale in the north, the Tasman Sea in the east, the locality of Thirroul in the south and the Illawarra Coast Range in the west. Major features of the area include Lady Fuller Park, Austinmer Beach, Austinmer Boat Harbour, Austinmer Beach Park and Glastonbury Gardens.