Pretoria - The Democratic Alliance has seen an increase in the number of black supporters, the party says.
"We grew our support among black South Africans from 0.8% in 2009 to approximately 6% in 2014," party leader Helen Zille told reporters at the Electoral Commission's national results operations centre.
"Roughly 760 000 black South Africans voted for the DA."
Zille said 40% of the votes were won in Gauteng.
She added that the number of black DA voters was more than the Inkatha Freedom Party, National Freedom Party, Pan Africanist Congress and United Christian Democratic Party combined.
It was also more than any other party besides the African National Congress and Economic Freedom Fighters.
Zille said: "A total of 20% of our votes in this election was cast by black South Africans.
"The DA is the only party that has grown consistently in every election since 1994 when we won just 1.7%," she said.
Other parties had come and gone but the DA kept winning and growing, Zille said.
"We are stronger and bigger than ever."
The results were an indication that people's political attitudes were changing and more people were moving away from race as a voting determinant.
"This is encouraging for the future of our democracy," said Zille.
Follow the results LIVE.