The wine regions of South Africa were defined under the "Wine of Origin" (Wyn van Oorsprong) act of 1973. Mirroring the French Appellation d'origine contrôlée (AOC) system, all South African wines listing a "Wine of Origin" must be composed entirely of grapes from its region. The "Wine of Origins" (WO) program mandates how wine regions of South Africa are defined and can appear on wine labels. While some aspects of the WO are taken from the AOC, the WO is primarily concerned with accuracy in labeling. As a result, the WO does not place adjunct regulations on wine regions such as delineating permitted varieties, trellising methods, irrigation techniques, and crop yields.
The WO system divides growing regions into four categories. The largest and most generic are Geographical Units (such as the Western Cape region) which subsume the smaller, but still broad spanning Regions (such as Cape South Coast). Under these are clustered districts (like Walker Bay) and within them are wards (such as Elgin). Although these are geographic units, regions and districts are largely traced by political boundaries (wards are the segment most defined by unique, Terroir characteristics).
Western Cape - A large multi-regional designation covering every appellation except those in the Northern Cape.KwaZulu-Natal - The whole Province was designated as a Geographical Unit in August 2005.Eastern Cape - The Eastern Cape Province was designated South Africa’s newest wine region in 2009.LimpopoNorthern CapeWestern Cape
Boberg - For use in respect of fortified wines from Paarl, Franschhoek and Tulbagh.Breede River Valley - contains three wine districts and fifteen wardsCape South Coast - contains five districts and 15 wardsCoastal Region - contains eight districts and seventeen wardsKlein Karoo - contains two districts and five wardsOlifants River - contains three districts and five wardsNorthern Cape
Northern Cape - contains two districts and three wardsEastern Cape
Eastern Cape - contains no districts and one wardBoberg - Paarl, Franschhoek and TulbaghBreede River Valley - Breedekloof, Robertson, and WorcesterCape South Coast - Cape Agulhas, Overberg, Plettenberg Bay, Swellendam and Walker BayCoastal Region - Cape Peninsula, Darling, Franschhoek/Franschhoek Valley, Paarl, Stellenbosch, Swartland, Tulbagh, Tygerberg and WellingtonKlein Karoo - Calitzdorp and Langeberg-GarciaOlifants River - Citrusdal Mountain, Citrusdal Valley and Lutzville ValleyNorthern Cape - Douglas and Sutherland-Karoo,Western Cape:
Breedekloof district of the Breede River Valley - Goudini and SlanghoekRobertson district of the Breede River Valley - Agterkliphoogte, Bonnievale, Boesmansrivier, Eilandia, Hoopsrivier, Klaasvoogds, Le Chasseur, McGregor and VinkrivierWorcester district of the Breede River Valley - Aan-de-Doorns, Hex River Valley, Nuy and ScherpenheuvelCape Agulhas district of the Cape South Coast - ElimOverberg district of the Cape South Coast - Elgin, Greyton, Klein River and TheewaterSwellendam district of the Cape South Coast - Buffeljags, Malgas and StormsvleiWalker Bay district of the Cape South Coast - Bot River, Hemel-en-Aarde Ridge, Hemel-en-Aarde Valley, Sunday's Glen, Upper Hemel-en-Aarde ValleyOther wards from the Cape South Coast - Herbertsdale and Stilbaai EastDarling district of the Coastal Region - GroenekloofPaarl district of the Coastal Region - Simonsberg-Paarl, Voor Paardeberg, and WellingtonStellenbosch district of the Coastal Region - Banghoek, Bottelary, Devon Valley, Jonkershoek Valley, Papegaaiberg, Polkadraai Hills and Simonsberg-StellenboschSwartland district of the Coastal Region - Malmesbury and RiebeekbergTygerberg district of the Coastal Region - Durbanville and PhiladelphiaOther wards in the Coastal Region - Constantia and Hout BayOther wards in the Klein Karoo Region - Montagu, Tradouw, Tradouw Highlands, Outeniqua and Upper LangkloofCitrusdal Mountain district of the Olifants River region - PiekenierskloofLutzville Valley district of the Olifants River region - KoekenaapOther wards in the Olifants River Region - Bamboes Bay, Spruitdrift, Vredendal, Cederberg, Ceres, Lamberts Bay, Prince Albert Valley and Swartberg
Northern Cape:
Wards of the Northern Cape - Hartswater, Central Orange River and Rietrivier FSEastern Cape:
Wards of the Eastern Cape - St Francis Bay 
