Iran's semi-official ISNA cited education minister Alireza Kazemi as saying that Iranian school in Jeddah has reopened after years of closure.
The move, Kazemi said, has "increased Iran’s educational influence in the region."
Iran’s only school in Saudi Arabia was closed in 2016 after Iran withdrew its diplomatic staff from the kingdom.
At the time, Iranian reported that the school had 15 students and two Iranian teachers, who returned to Iran along with the diplomats after the ambassador left Saudi Arabia.
In January 2016, Saudi Arabia severed ties with Iran in 2016 following the storming of its embassy in Tehran during a dispute over Riyadh's execution of Shiite Muslim cleric Sheikh Nimr al-Nimr.
Nimr, who was one of the leaders of the Shiite protests in Saudi Arabia in 2011, had studied in Iran’s religious city of Qom.
Iran's Supreme Leader Ali Khamenei called the execution of Nimr "a political mistake and a great sin".