Nalyappa is a locality in South Australia located on the west coast of Yorke Peninsula immediately adjoining Spencer Gulf about 128 kilometres (80 mi) north-west of the Adelaide city centre.
Its boundaries which were created in May 1999 for the “long established name” which is derived from a Narungga (i.e. local aboriginal people) word ‘Nhalyabba.’
Its coastline includes Tiparra Bay and its southern headland, Cape Elizabeth.
As of 2016, land use within the locality consisted of agriculture being the major use followed by conservation being associated with the coastline adjoining Spencer Gulf.
Nalyappa is located within the federal division of Grey, the state electoral district of Goyder and the local government area of the Yorke Peninsula Council.