Katarapko is a locality in the Australian state of South Australia located in the Riverland about 188 kilometres (117 mi) north-east of the Adelaide city centre and about 6.6 kilometres (4.1 mi) north of Loxton. The land within the locality is zoned for conservation with the locality being completely occupied by most of the Katarapko section of the Murray River National Park. Katarapko is located within the federal division of Barker, the state electoral district of Chaffey and the local government area of the Berri Barmera Council.