Ahead of the vote this time round, campaigning was more muted although Khamenei's office repeated his call to the ballot boxes Friday with posts on social networking site Twitter.
"I humbly expect from our nation to participate all in #IranElection & do this as soon as possible," the supreme leader's post said.
Voting is not mandatory in Iran, but there are major incentives to push people to the polls. An active voter has a better shot at promotions in the workplace and preference when it comes to collecting social welfare benefits.
This can be vital in an economy that is chronically weighed down by international sanctions over nuclear concerns.
Khamenei also tweeted a jab at the United States, which has often led the charge to tighten those sanctions.
"I have heard that #USpoliticians said they don't recognize #IranianElection. Hell with their recognition!" he said.
Clampdown on dissent?
Rights group Amnesty International said this week that it was "concerned by evidence that the Iranian authorities are intensifying their clampdown on dissent" in the run-up to the vote.
"Those targeted include political activists, journalists and other media workers, trade unionists, advocates of greater rights for Iran's religious and ethnic minorities, students and others. In many cases, the full reasons for arrest and detention are not known; in others, those arrested have been brought before the courts on sweeping but vaguely worded charges, convicted and sentenced to prison terms," it said.
The head of language services for BBC World Service, Liliane Landor, also complained Thursday of "unacceptable harassment" of its staff and other independent journalists in Iran.
"The BBC is very concerned by the unprecedented levels of intimidation being suffered by families of BBC Persian Service staff living in Iran in the final days of the presidential election campaign," she said.
"The harassment has included threats that relatives will lose jobs and pensions and be prevented from traveling abroad. For the first time the lives of BBC Persian TV staff living in the UK have also been threatened."
Iran's Minister of Culture and Islamic Guidance, Mohammad Hosseini, said more than 2,000 local reporters and 450 foreign journalists were covering the election in Iran.
The head of the Foreign Reporters Bureau within the ministry, Alireza Shirvani, said the number of foreign reporters covering the presidential election had increased by about 15% compared with four years ago.