Raisi won 62 per cent of the vote with about 90 per cent of ballots counted from Friday's election, poll officials said, without releasing turnout figures, after the three other candidates had conceded defeat.
Supported by the powerful Revolutionary Guards Corps, Raisi, a close Khamenei ally who vows to fight corruption, is under US sanctions for alleged involvement in executions of political prisoners decades ago.
Iran began voting Friday in a presidential election tipped in the favor of a hard-line protege of Supreme Leader Ayatollah Ali Khamenei, fueling public apathy and sparking calls for a boycott in the Islamic Republic.
Ultimate power in Iran, since its 1979 revolution toppled the US-backed monarchy, rests with the supreme leader, but the president wields major influence in areas from industrial policy to foreign affairs. However, Raisi dominated the election only after a panel under the watch of Supreme Leader Ayatollah Ali Khamenei disqualified his strongest competition.
"The great victor of yesterday's elections is the Iranian nation because it has risen up once again in the face of the propaganda of the enemy's mercenary media", he said.
Di 60-year-old cleric don serve as prosecutor for most of im career. He was appointed head of the judiciary in 2019, two years after he lost by a landslide to Hassan Rouhani in the last presidential election.
On Twitter, Mr Rezaei praised Mr Khamenei and the Iranian people for taking part in the vote. "But it is clear who received the votes", Rouhani said. His two years as Iran's chief justice were marked by the intensified repression of dissent and human rights abuses. He was one of four judges who oversaw death sentences for about 5,000 prisoners, according to Amnesty International.
Iran has never acknowledged the mass executions, and Raisi has never publicly addressed allegations about his role. So how much does this election mean for the future of Iran?
If elected, Raisi would be the first serving Iranian president sanctioned by the US government even before entering office over his involvement in the mass execution of political prisoners in 1988, as well as his time as the head of Iran's internationally criticized judiciary - one of the world's top executioners.
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Primary care providers will be reaching out to book appointments, Ontario said. "Treat a crisis like a crisis", Bogoch said. Whether the timeline for the next phase changes will depend on what happens in the coming weeks, Elliott said.
BBC Persian correspondent Kasra Naji adds that under Mr Raisi Iran's hardliners will seek to reinforce a puritanical system of Islamic government, possibly meaning more controls on social activities, fewer freedoms and jobs for women, and tighter control of social media and the press.
Di hardliners dey suspect di West, but both Raisi and Supreme Leader Khamenei favour return to worldwide deal on Iran nuclear activity.
The Joint Comprehensive Plan of Action, signed in 2015, gave Iran relief from Western sanctions in return for limiting its nuclear activities.
Di US pulled out of di deal for 2018, and President Trump administration re-impose heavy limits on Iran ability to trade.
A win for Raisi would confirm the political demise of pragmatist politicians like Rouhani, weakened by the USA decision to quit the nuclear deal and reimpose sanctions in a move that stifled rapprochement with the West.
Talks wey dey aimed at resurrecting di deal dey go on for Vienna, President Joe Biden also dey ready to revive am. But both sides say the other must make the first move.
In the run-up to the election, Raisi's predicted victory led to discussion among reformists about whether to vote at all. This has alienated a good number of Iranians already deeply discontented with their living conditions in an economy that is crippled by United States sanctions but also mismanagement.
This is while the Interior Ministry has not yet issued any statement on election results. There will be more tension with the West.
While state television showed long queues at polling stations in several cities, the semi-official Fars news agency reported 22 million or 37% of voters had cast ballots by 7:30 p.m. (1500 GMT), citing its own reporter. Some 59 million Iranians were eligible to vote.