Mahmoud Ahmadinejad was the president of Iran from 2005 tom 2013. He had also been the mayor of Tehran earlier and had also served as a leader of the conservative coalition Alliance of Builders of Islamic Iran, or Abadgaran. He is also part of the Islamic Society of Engineers.
Hassan Rouhani is an Iranian politician and the current president of Iran. Serving as the Iranian president since 3 August 2013, Rouhani was named in Time magazine's 100 Most Influential People in the World list in 2013. One of the most popular Iranian politicians of all time, Hassan Rouhani is credited with improving the country's diplomatic relations with other countries.

Mohammad Khatami is an Iranian politician who served as the President of Iran from 1997 to 2005. A respected and influential politician, Khatami advocated tolerance, freedom of expression, and civil society during his presidency. He also served as the Minister of Culture of Iran from 1982 to 1992.

Abolhassan Banisadr was an Iranian writer and politician who served as the first president of Iran from 4 February 1980 to 22 June 1981. Prior to his presidency, Banisadr served as the Minister of Finance from 17 November 1979 to 10 February 1980. Abolhassan Banisadr is also credited with co-founding a political organization called National Council of Resistance of Iran.

Mohammad-Ali Rajai was the second president of Iran, in office for just a few weeks in August 1981 before his untimely death. Before this, he served as prime minister under Abolhassan Banisadr. A teacher by profession, he became actively involved in the Iranian Revolution and joined politics. He was assassinated on 30 August 1981.