Iranians voted on Friday to replace the late President Ebrahim Raisi, who was killed in a May helicopter crash in the country's northwest along with the foreign minister and several other officials.
Analysts broadly described the race as a three-way contest. There are two hard-liners, former nuclear negotiator Saeed Jalili and the parliament speaker, Mohammad Bagher Qalibaf. Then there's the reformist candidate Masoud Pezeshkian, who has aligned himself with those seeking a return to the 2015 nuclear deal with world powers.
After record-low turnout in recent elections, it remains unclear how many Iranians will take part in Friday's poll.
While 85-year-old Supreme Leader Ayatollah Ali Khamenei has final say on all matters of state, presidents can bend Iran toward confrontation or negotiations with the West.
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As Iran's presidential vote looms, tensions boil over regarding a renewed headscarf crackdown.
An analysis explores how no matter who wins Iran's election, much may
