Chart of Afrikaners among white South Africans by province

Afrikaners make up approximately 58% of South Africa's white segment, based on language used in the home. English speakers - an ethnically diverse group - account for closer to 37%. As in Canada or the United States, most modern European immigrants elect to learn English and are likelier to identify with those descended from British colonials of the nineteenth century.[39] Aside from coastal pockets in the Eastern Cape and KwaZulu-Natal they remain heavily outnumbered by those of Afrikaans origin.

Reference 1: Afrikaners, % Afrikaners and All whites.

Reference 2: Eastern Cape, Free State, Gauteng, KwaZulu-Natal, Limpopo, Mpumalanga, North West, Northern Cape, Western Cape and Total.

Source: http://en.wikipedia.org/wiki/Afrikaner