Kohinoor is a locality in the Australian state of South Australia located on Kangaroo Island about 137 kilometres (85 miles) south-west of the state capital of Adelaide and about 20 kilometres (12 miles) south-east of the municipal seat of Kingscote.

[2][3] Its boundaries were created in March 2002 for the “long established name” which was derived from Kohinoor Hill, a hill located within the locality’s boundaries.

[2] Kohinoor is bounded in part by the Playford Highway to the north.

[2] The principal land use in the locality is primary production.

[8][2] Kohinoor is located within the federal division of Mayo, the state electoral district of Mawson and the local government area of the Kangaroo Island Council.