They are vying to become the first woman to lead the country, which is one of the world’s largest economies and a major oil producer.
Polls show a tight race between the two main candidates, with the final result likely to be decided by a run-off vote.
The election is taking place against a backdrop of economic crisis, with the country’s currency losing its value and inflation on the rise.
The country has a history of political instability, with its current leader having been in power for over a decade.
Both candidates have promised to address the economic challenges facing the nation, including high unemployment and a large public debt.
The election is being watched closely by international observers, who are monitoring for any signs of fraud or irregularities.
If elected, the winner will face the daunting task of leading a country that is deeply divided along political and ethnic lines.
Despite the challenges, many voters expressed hope that the election could bring about much-needed change.
