Election officials said they were investigating a shooting death in rural KwaZulu-Natal province, the home of President Jacob Zuma. The incident was a rare blot on an otherwise peaceful vote.
The African National Congress, which led the fight against apartheid, has dominated politics since Nelson Mandela was elected as South Africa's first black president in 1994.
On the ruling party's watch, millions of people have gained access to water and other basic services, but protests routinely erupt in areas where residents say the government has ignored their needs.
Zuma has become enmeshed in a scandal surrounding more than $20 million in state spending on his private home in the Nkandla area, though he denies any wrongdoing and has promised to work against corruption. He confidently told reporters on Monday the Nkandla controversy was "not an issue with the voters."
The opposition Democratic Alliance is a centrist party led by former journalist and anti-apartheid activist Helen Zille, and the Economic Freedom Fighters is headed by Julius Malema, a former head of the ruling party's youth league.
Wire services
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