List of monarchs of Iran

The monarchs of Iran ruled for over two and a half millennia, beginning as early as the 7th century BC and enduring until the 20th century AD. The earliest Iranian king is generally considered to have been either Deioces of the Median dynasty (c. 727–550 BC) or Cyrus the Great of the Achaemenid dynasty (550–330 BC). The last Iranian king was Mohammad Reza Pahlavi of the Pahlavi dynasty (1925–1979), which was overthrown by the Islamic Revolution. Since then, Iran has been governed as an Islamic republic.

In classical antiquity, Iran reached the peak of its power and prestige under the Achaemenid Empire, which stretched from Egypt and parts of Southeast Europe in the west to the Indus Valley and parts of Central Asia in the east. By 323 BC, the Achaemenid Empire's territories had been conquered by the Macedonian Empire during the Wars of Alexander the Great, bringing Iran into the Hellenistic sphere with the Seleucid Empire (305–129 BC). However, native Iranian rule was revived with the establishment and expansion of the Parthian Empire (247 BC–224 AD) and then the Sasanian Empire (224–651), which existed until the Arab conquest of Iran.

Medieval Iran alternated between being ruled by large foreign empires and being divided into several smaller kingdoms. Most of the Sasanian lands were annexed by the Rashidun Caliphate (638–661), which was succeeded by the Umayyad Caliphate (661–750) and then by the Abbasid Caliphate (749–861). Under the Abbasids, many Iranian figures took part in shaping the Islamic Golden Age, while also leveraging the decline of Arab power to establish independent dynasties and kingdoms, thus allowing their native languages to flourish and reviving Sasanian royal iconography and ideology in what became known as the Iranian Intermezzo. In the 11th century, Iran was conquered by the Seljuk Empire (1038–1194), which was Turkic in origin, but culturally Persianate. Further conquests by entities coming from Central Asia occurred over the course of the next five centuries, most notably including the Turkic Khwarazmian Empire (1097–1220/1221), the Mongol Empire (1220–1259), the post-Mongol Ilkhanate (1256–1335), and the Turkic Timurid Empire (1370–1458).

The year 1501 is considered the beginning of modern Iranian history, as the Kurdish-origin Safavid dynasty (1501–1736) rose to power and oversaw the conversion of Iran to Shia Islam, marking the region's largest religious shift since the Arab conquests. The collapse of the Safavids led to an intermediate period of turmoil, with rule of Iran contested between Safavid dynasts as well as the Afghan-origin Hotak dynasty (1722–1729). Nader Shah replaced these with the Afsharid Empire (1736–1796), but after his assassination in 1747, the Afsharids competed with the Zand dynasty (1751–1794) under Karim Khan Zand and his successors for supremacy. Iran was eventually reunified by the Qajar dynasty (1789–1925), which was succeeded by the Pahlavi dynasty of Reza Khan. The Pahlavi dynasty was the last to reign before the Iranian monarchy was abolished in 1979; Iran's head of state has since been the Supreme Leader of the Islamic Revolution, beginning with Ruhollah Khomeini, who was succeeded upon his death in 1989 by the incumbent Ali Khamenei.