The "Adelaide Plains" has only been in use as a separate Geographical Indication since 2002, but it houses some of the most historic vineyards in Australia including the sources for Australia's most famous wine, Penfolds Grange. The region is to the immediate north of the city of Adeliade and tucked between the Barossa Valley to the northeast and the Gulf of St. Vincent on its western border.

The region's climate is hot and dry, but closer proximity to the ocean helps to moderate temperatures. Shiraz and Carbernet Sauvignon are the stars of the region and produce big, fruit laden, full-bodied wines. Plantings of Chardonnay and other whites tend to the very ripe, tropical fruit-flavored end of the spectrum. While most of the region's production has been used by the major Barossa wineries, recent years have seen a growth in small producers focusing on the "show-styles" of wine that the region is known for. (Wine/Appellations)