Cabinet ministers and senior officials from the two countries signed the documents as part of efforts to boost the relations between Tehran and Seoul.
The deals are meant to boost bilateral collaborations in a range of fields, from maritime transportation to cultural and academic issues.
An extradition treaty was among the agreements signed in the ceremony.
Other MoUs were on cooperation in the oil, gas and petrochemical industry, management of water resources, technological interaction, medical fields and banking ties.
Heading a big delegation of Korean ministers, top officials and business people, South Korean President Park Geun arrived in Tehran on Sunday for a three-day official trip, marking the first such trip since the two countries established diplomatic ties in 1962.
The visit follows a new wave of interest in ties with Iran after Tehran and the Group 5+1 (Russia, China, the US, Britain, France and Germany) on July 14, 2015 reached a conclusion over the text of a comprehensive 159-page deal on Tehran’s nuclear program.
The lasting nuclear deal, known as the Joint Comprehensive Plan of Action (JCPOA), took effect in January, terminating the nuclear-related sanctions imposed on Iran.
South Korea remains one of the major crude importers from Iran. The East Asian nation’s oil imports from Iran sharply increased earlier this year immediately after the anti-Iran economic sanctions were lifted under the JCPOA.
South Korea is the world’s fifth-largest oil importer while Iran has the fourth largest oil reserves. The trade between the two countries is estimated to have stood at $ 6.1 billion in 2015.