Kangaroo Island is Australia's third-largest island after Tasmania and Melville Island. It is 112 kilometres (70 mi) southwest of Adelaide at the entrance of Gulf St Vincent. Its closest point to the mainland is 13 kilometres (8 mi) off Cape Jervis, on the tip of the Fleurieu Peninsula in the state of South Australia. The island is 150 km (93 mi) long and between 900 m (980 yd) and 57 km (35 mi) wide, its area covering 4,405 km2 (1,701 sq mi). Its coastline is 540 kilometres (340 mi) long and highest altitude is 307 m (1,010 ft). It is separated from Yorke Peninsula to the northwest by Investigator Strait and from Cape Jervis to the northeast by Backstairs Passage.
Kangaroo Island is Australia's third-largest island after Tasmania and Melville Island. It is 112 kilometres (70 mi) southwest of Adelaide at the entrance of Gulf St Vincent. Its closest point to the mainland is 13 kilometres (8 mi) off Cape Jervis, on the tip of the Fleurieu Peninsula in the state of South Australia. The island is 150 km (93 mi) long and between 900 m (980 yd) and 57 km (35 mi) wide, its area covering 4,405 km2 (1,701 sq mi). Its coastline is 540 kilometres (340 mi) long and highest altitude is 307 m (1,010 ft). It is separated from Yorke Peninsula to the northwest by Investigator Strait and from Cape Jervis to the northeast by Backstairs Passage.