The State Library of South Australia, or SLSA, formerly known as the Public Library of South Australia, located on North Terrace, Adelaide, is the official library of the Australian state of South Australia. It is the largest public research library in the state, with a collection focus on South Australian information, being the repository of all printed and audiovisual material published in the state, as required by legal deposit legislation. It holds the "South Australiana" collection, which documents South Australia from pre-European settlement to the present day, as well as general reference material in a wide range of formats, including digital, film, sound and video recordings, photographs, and microfiche. Home access to many journals, newspapers and other resources online is available.

North Terrace is one of the four terraces that bound the central business and residential district of Adelaide, the capital city of South Australia. It runs east–west, along the northern edge of "the square mile". The western end continues on to Port Road, and the eastern end continues across the Adelaide Parklands as Botanic Road.