Presidential elections are scheduled to be held in Iran in 2021. However, the elections can be held earlier under exceptional circumstances, such as the deposition, resignation or death of the president. It will be the thirteenth presidential election in Iran. Under the Iranian constitution, Hassan Rouhani, the incumbent president, is ineligible to run for re-election as he was limited to two terms or 8 years in office.
The president of Iran is elected for a four years term that is renewable only once. It is the country’s highest directly elected official, the chief of the executive branch, and the second most important position after the Supreme Leader.
Sources and further reading:
Iran’s presidential election: Four ways it matters
https://www.bbc.co.uk/news/world-middle-east-57097664
Iranian Presidential Election 2021: A Shift from Reformists to Hardliners
Profiles Of Iran’s 2021 Presidential Candidates
https://iranintl.com/en/iran/profiles-irans-2021-presidential-candidates