Ali Raza Rashidian on Monday said the number shows a 50 percent rise compared to the previous year’s Arbaeen season.
He noted that 2,046,000 of the pilgrims were men and the rest were women.
Tehran province had the highest number of Arbaeen pilgrims among the country’s provinces, Rashidian added.
He went on to say that the Hajj and Pilgrimage Organization will continue to provide services to the Arbaeen pilgrims until the last ones return to the country.
Arbaeen comes 40 days after Ashura, the martyrdom anniversary of the third Shia Imam, Imam Hussein (AS).
Each year, a huge crowd of Shias, including many Iranians, flock to the Iraqi city of Karbala, where the holy shrine of Imam Hussein (AS) is located, to perform mourning rites.
Arbaeen fell on Saturday, October 19, this year.