Mahmoud Ahmadinejad, also written Ahmadinezhad (Persian: محمود احمدی‌نژاد; born October 28, 1956) is an Iranian politician who was the sixth President of the Islamic Republic of Iran. He was president from August 3, 2005 to August 3, 2013.

Ahmadinejad became the mayor of Tehran, the capital of Iran, on May 3, 2003. He was chosen to be the president in elections on June 24, 2005. Many people think he is very religious. Because of that, the religious leadership in Iran supported him in many ways when he was elected.

Ahmadinajad's political power comes from the Alliance of Builders of Islamic Iran, also known as "Abadgaran". This is an alliance between Islamic parties and organizations.

Mahmoud Ahmadinejad has a Master of Science in Civil engineering from the Iran University of Science and Techology. He also has a PhD in transportation engineering from the same university. Hassan Rouhani was elected on June 15, 2013 as Ahmadinejad's successor and took office on August 3, 2013.

His brother was failed presidential candidate and staff member Davoud Ahmadinejad (1950–2017).