Saeed Jalili, (Persian: سعید جلیلی, born 1965 in Mashhad ) is an Iranian politician and the present secretary of Iran's Supreme National Security Council. On October 20, 2007, he replaced Ali Larijani as the secretary of the council and hence chief nuclear negotiator of Iran. He was previously Deputy Foreign Minister for European and American Affairs.

Born 1965 in Mashhad, Jalili has a Ph.D in political science from Imam Sadeq University, the title of his doctoral thesis was "Paradigm of Political Thought of Islam in the Holy Quran". He worked as a university lecturer before becoming a junior government official in 1989, rising to become Director General for Office of Supreme Leader of Iran in 2001 and Deputy Foreign Minister for European and American Affairs and an advisor to the President Mahmoud Ahmadinejad in 2005. He speaks Persian, English, and Arabic. Hassan Rowhani has challenged this gentleman to a debate along with Ahmadinejad

According to Radio Zamaneh, Jalili is an old close friend of President Ahmadinejad, and was Ahmadinejad's first choice as the Minister of Foreign Affairs, which he did not introduce due to some "interests" (he introduced Manouchehr Mottaki to Majlis for the post). Radio Zamaneh also suggests that it was Jalili who has drafted Ahmadinejad's letter to George W. Bush. According to New York Times correspondent Roger Cohen, Jalili is considered by some "a chief architect of the clampdown" on protest in Iran over the 2009 election.