This report summarises the mapping compilation process of the 1:2 000 000 regolith map of South Australia, and provides an overview of major regolith features. Map compilation was undertaken in ArcGIS and was based on the integration of a variety of input datasets, including existing geology data and regolith maps, interpretation of remote sensing imagery, digital elevation data and their derivative products, and geophysical data, all of which had previously been compiled at various scales. The work of compilation progressed by treating in turn all standard 1:250 000 map series sheet areas, and was complemented by interpreting the 1:100 000 digital geology dataset, using the RTMAP (Regolith-Terrain Map) classification scheme, which had to be adjusted and revised to cater for South Australia's regolith conditions. The map consists of three main data components: (1) regolith materials and landforms, (2) regolith material induration (ferruginous, calcareous, siliceous, gypsiferous, mixed and undifferentiated) and (3) surface lag. It is intended that the State regolith map will also form an integral part of an Australia-wide regolith map, aspects of which are currently being generated by Geoscience Australia in collaboration with the state geological surveys, and to this end the South Australian state map does/will edge-match other existing and proposed state regolith maps.