Iran, officially the Islamic Republic of Iran, and also called Persia,
is a country located in
Western Asia. It is bordered by
Iraq
Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to the north, Iran to the east, the Persian Gulf an ...
and
Turkey to the west, by
Azerbaijan and
Armenia to the northwest, by the
Caspian Sea and
Turkmenistan
Turkmenistan ( or ; tk, Türkmenistan / Түркменистан, ) is a country located in Central Asia, bordered by Kazakhstan to the northwest, Uzbekistan to the north, east and northeast, Afghanistan to the southeast, Iran to the south ...
to the north, by
Afghanistan and
Pakistan
Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's fifth-most populous country, with a population of almost 243 million people, and has the world's second-lar ...
to the east, and by the
Gulf of Oman
The Gulf of Oman or Sea of Oman ( ar, خليج عمان ''khalīj ʿumān''; fa, دریای عمان ''daryâ-ye omân''), also known as Gulf of Makran or Sea of Makran ( ar, خلیج مکران ''khalīj makrān''; fa, دریای مکرا ...
and the
Persian Gulf
The Persian Gulf ( fa, خلیج فارس, translit=xalij-e fârs, lit=Gulf of Fars, ), sometimes called the ( ar, اَلْخَلِيْجُ ٱلْعَرَبِيُّ, Al-Khalīj al-ˁArabī), is a mediterranean sea in Western Asia. The bod ...
to the south. It covers an area of , making it the
17th-largest country. Iran has a population of 86 million, making it the
17th-most populous country in the world, and the second-largest in the
Middle East
The Middle East ( ar, الشرق الأوسط, ISO 233: ) is a geopolitical region commonly encompassing Arabia (including the Arabian Peninsula and Bahrain), Asia Minor (Asian part of Turkey except Hatay Province), East Thrace (Europea ...
. Its largest cities, in descending order, are the capital
Tehran,
Mashhad
Mashhad ( fa, مشهد, Mašhad ), also spelled Mashad, is the second-most-populous city in Iran, located in the relatively remote north-east of the country about from Tehran. It serves as the capital of Razavi Khorasan Province and has a po ...
,
Isfahan
Isfahan ( fa, اصفهان, Esfahân ), from its ancient designation ''Aspadana'' and, later, ''Spahan'' in middle Persian, rendered in English as ''Ispahan'', is a major city in the Greater Isfahan Region, Isfahan Province, Iran. It is ...
,
Karaj
Karaj ( fa, کرج, ) is the capital of Alborz Province, Iran, and effectively a satellite city of Tehran. Although the county hosts a population around 1.97 million, as recorded in the 2016 census, most of the county is rugged mountain. The urba ...
,
Shiraz, and
Tabriz.
The country is home to one of the world's oldest civilizations, beginning with the formation of the
Elamite kingdoms in the fourth millennium BC. It was first unified by the
Medes
The Medes (Old Persian: ; Akkadian: , ; Ancient Greek: ; Latin: ) were an ancient Iranian people who spoke the Median language and who inhabited an area known as Media between western and northern Iran. Around the 11th century BC, t ...
, an
ancient Iranian people, in the seventh century BC,
and reached its territorial height in the sixth century BC, when
Cyrus the Great
Cyrus II of Persia (; peo, 𐎤𐎢𐎽𐎢𐏁 ), commonly known as Cyrus the Great, was the founder of the Achaemenid Empire, the first Persian empire. Schmitt Achaemenid dynasty (i. The clan and dynasty) Under his rule, the empire embraced ...
founded the
Achaemenid Persian Empire, which became
one of the largest empires in history and a
superpower.
The Achaemenid Empire fell to
Alexander the Great
Alexander III of Macedon ( grc, wikt:Ἀλέξανδρος, Ἀλέξανδρος, Alexandros; 20/21 July 356 BC – 10/11 June 323 BC), commonly known as Alexander the Great, was a king of the Ancient Greece, ancient Greek kingdom of Maced ...
in the fourth century BC and was subsequently divided into several
Hellenistic states
In Classical antiquity, the Hellenistic period covers the time in Mediterranean history after Classical Greece, between the death of Alexander the Great in 323 BC and the emergence of the Roman Empire, as signified by the Battle of Actium in 3 ...
. An Iranian rebellion established the
Parthian Empire
The Parthian Empire (), also known as the Arsacid Empire (), was a major Iranian political and cultural power in ancient Iran from 247 BC to 224 AD. Its latter name comes from its founder, Arsaces I, who led the Parni tribe in conquer ...
in the third century BC, which was succeeded in the third century AD by the
Sassanid Empire, a major world power for the next four centuries.
Arab Muslims conquered the empire in the seventh century AD, which led to the
Islamization of Iran
The Islamization of Iran occurred as a result of the Muslim conquest of Persia in 633–654 AD. It was a long process by which Islam, though initially rejected, eventually spread among the population. Iranians have maintained certain pre-Islami ...
. It subsequently became a major center of
Islamic culture
Islamic culture and Muslim culture refer to cultural practices which are common to historically Islamic people. The early forms of Muslim culture, from the Rashidun Caliphate to the early Umayyad period and the early Abbasid period, were predo ...
and learning, with
its art,
literature
Literature is any collection of written work, but it is also used more narrowly for writings specifically considered to be an art form, especially prose fiction, drama, and poetry. In recent centuries, the definition has expanded to include o ...
,
philosophy
Philosophy (from , ) is the systematized study of general and fundamental questions, such as those about existence, reason, Epistemology, knowledge, Ethics, values, Philosophy of mind, mind, and Philosophy of language, language. Such quest ...
, and
architecture
Architecture is the art and technique of designing and building, as distinguished from the skills associated with construction. It is both the process and the product of sketching, conceiving, planning, designing, and constructing buildings o ...
spreading across the
Muslim world
The terms Muslim world and Islamic world commonly refer to the Islamic community, which is also known as the Ummah. This consists of all those who adhere to the religious beliefs and laws of Islam or to societies in which Islam is practiced. In ...
and beyond during the
Islamic Golden Age
The Islamic Golden Age was a period of cultural, economic, and scientific flourishing in the history of Islam, traditionally dated from the 8th century to the 14th century. This period is traditionally understood to have begun during the reign ...
. Over the next two centuries, a series of
native Iranian Muslim dynasties emerged before the
Seljuk Turks and the
Mongols
The Mongols ( mn, Монголчууд, , , ; ; russian: Монголы) are an East Asian ethnic group native to Mongolia, Inner Mongolia in China and the Buryatia Republic of the Russian Federation. The Mongols are the principal member o ...
conquered the region. In the 15th century, the native
Safavids
Safavid Iran or Safavid Persia (), also referred to as the Safavid Empire, '. was one of the greatest Iranian empires after the 7th-century Muslim conquest of Persia, which was ruled from 1501 to 1736 by the Safavid dynasty
The Safavid dy ...
re-established a unified Iranian state and national identity,
and
converted the country to Shia Islam.
Under the reign of
Nader Shah
Nader Shah Afshar ( fa, نادر شاه افشار; also known as ''Nader Qoli Beyg'' or ''Tahmāsp Qoli Khan'' ) (August 1688 – 19 June 1747) was the founder of the Afsharid dynasty of Iran and one of the most powerful rulers in Iranian ...
in the 18th century, Iran presided over the most powerful military in the world,
though by the 19th century, a
series of conflicts with the
Russian Empire
The Russian Empire was an empire and the final period of the Russian monarchy from 1721 to 1917, ruling across large parts of Eurasia. It succeeded the Tsardom of Russia following the Treaty of Nystad, which ended the Great Northern War. Th ...
led to significant territorial losses.
The early 20th century saw the
Persian Constitutional Revolution
The Persian Constitutional Revolution ( fa, مشروطیت, Mashrūtiyyat, or ''Enghelāb-e Mashrūteh''), also known as the Constitutional Revolution of Iran, took place between 1905 and 1911. The revolution led to the establishment of a pa ...
. Efforts to nationalize
its fossil fuel supply from
Western companies led to an
Anglo-American coup in 1953, which resulted in greater autocratic rule under
Mohammad Reza Pahlavi
, title = Shahanshah Aryamehr Bozorg Arteshtaran
, image = File:Shah_fullsize.jpg
, caption = Shah in 1973
, succession = Shah of Iran
, reign = 16 September 1941 – 11 February 1979
, coronation = 26 October ...
and growing
Western political influence.
He went on to launch
a far-reaching series of reforms in 1963. After the
Iranian Revolution
The Iranian Revolution ( fa, انقلاب ایران, Enqelâb-e Irân, ), also known as the Islamic Revolution ( fa, انقلاب اسلامی, Enqelâb-e Eslâmī), was a series of events that culminated in the overthrow of the Pahlavi dynas ...
, the current
Islamic Republic
The term Islamic republic has been used in different ways. Some Muslim religious leaders have used it as the name for a theoretical form of Islamic theocratic government enforcing sharia, or laws compatible with sharia. The term has also been u ...
was established in 1979 by
Ruhollah Khomeini
Ruhollah Khomeini, Ayatollah Khomeini, Imam Khomeini ( , ; ; 17 May 1900 – 3 June 1989) was an Iranian political and religious leader who served as the first supreme leader of Iran from 1979 until his death in 1989. He was the founder of ...
, who became the country's first
Supreme Leader.
The
government of Iran
The Government of the Islamic Republic of Iran ( fa, نظام جمهوری اسلامی ایران, Neẓām-e jomhūrī-e eslāmi-e Irān, known simply as ''Neẓām'' ( fa, نظام, lit=the system) among its supporters) is the ruling state ...
is an
Islamic theocracy that includes some elements of a
presidential system
A presidential system, or single executive system, is a form of government in which a head of government, typically with the title of president, leads an executive branch that is separate from the legislative branch in systems that use separatio ...
, with the ultimate authority vested in an autocratic "Supreme Leader";
a position held by
Ali Khamenei since Khomeini's death in 1989. The Iranian government is
authoritarian, and has attracted widespread criticism for its significant constraints and abuses against
human rights
Human rights are moral principles or normsJames Nickel, with assistance from Thomas Pogge, M.B.E. Smith, and Leif Wenar, 13 December 2013, Stanford Encyclopedia of PhilosophyHuman Rights Retrieved 14 August 2014 for certain standards of hum ...
and civil liberties, including several violent suppressions of
mass protests,
unfair elections, and
limited rights for women and
for children. It is also a focal point for
Shia Islam within the Middle East, countering the long-existing
Arab and
Sunni hegemony within the region. Since the Iranian Revolution, the country is widely considered to be the
largest adversary of Israel and
also of Saudi Arabia. Iran is also considered to be one of the biggest players within Middle Eastern affairs, with its government being involved both directly and indirectly in the majority of
modern Middle Eastern conflicts.
Iran is a
regional and
middle power
In international relations, a middle power is a sovereign state that is not a great power nor a superpower, but still has large or moderate influence and international recognition.
The concept of the "middle power" dates back to the origins o ...
, with a geopolitically strategic location in the
Asian continent. It is a founding member of the
United Nations
The United Nations (UN) is an intergovernmental organization whose stated purposes are to maintain international peace and security, develop friendly relations among nations, achieve international cooperation, and be a centre for harmoniz ...
, the
ECO, the
OIC, and the
OPEC
The Organization of the Petroleum Exporting Countries (OPEC, ) is a cartel of countries. Founded on 14 September 1960 in Baghdad by the first five members (Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela), it has, since 1965, been headquart ...
. It has large reserves of
fossil fuel
A fossil fuel is a hydrocarbon-containing material formed naturally in the Earth's crust from the remains of dead plants and animals that is extracted and burned as a fuel. The main fossil fuels are coal, oil, and natural gas. Fossil fuels ma ...
s—including the second-largest
natural gas supply and the
third-largest proven oil reserves. The country's rich cultural legacy is reflected in part by its 26
UNESCO World Heritage Sites. Historically a multi-ethnic country, Iran remains a pluralistic society comprising
numerous ethnic, linguistic, and religious groups, with the largest of these being
Persians
The Persians are an Iranian ethnic group who comprise over half of the population of Iran. They share a common cultural system and are native speakers of the Persian language as well as of the languages that are closely related to Persian. ...
,
Azeris
Azerbaijanis (; az, Azərbaycanlılar, ), Azeris ( az, Azərilər, ), or Azerbaijani Turks ( az, Azərbaycan Türkləri, ) are a Turkic people living mainly in northwestern Iran and the Republic of Azerbaijan. They are the second-most nu ...
,
Kurds ug:كۇردلار
Kurds ( ku, کورد ,Kurd, italic=yes, rtl=yes) or Kurdish people are an Iranian ethnic group native to the mountainous region of Kurdistan in Western Asia, which spans southeastern Turkey, northwestern Iran, northern ...
,
Mazandaranis, and
Lurs
Lurs () are an Iranian people living in the mountains of western Iran. The four Luri branches are the Bakhtiari, Mamasani, Kohgiluyeh and Lur proper, who are principally linked by the Luri language.
Lorestan Province is named after the L ...
.
Name

The term ''
Iran'' derives directly from
Middle Persian
Middle Persian or Pahlavi, also known by its endonym Pārsīk or Pārsīg () in its later form, is a Western Middle Iranian language which became the literary language of the Sasanian Empire. For some time after the Sasanian collapse, Middle Pe ...
, first attested in a third-century inscription at
Naqsh-e Rostam
Naqsh-e Rostam ( lit. mural of Rostam, fa, نقش رستم ) is an ancient archeological site and necropolis located about 12 km northwest of Persepolis, in Fars Province, Iran. A collection of ancient Iranian rock reliefs are cut into t ...
, with the accompanying
Parthian Parthian may be:
Historical
* A demonym "of Parthia", a region of north-eastern of Greater Iran
* Parthian Empire (247 BC – 224 AD)
* Parthian language, a now-extinct Middle Iranian language
* Parthian shot, an archery skill famously employed b ...
inscription using the term , in reference to the
Iranians.
The
Middle Iranian ''ērān'' and ''aryān'' are oblique plural forms of
gentilic nouns ''ēr-'' (Middle Persian) and ''ary-'' (Parthian), both deriving from
Proto-Iranian language
Proto-Iranian or Proto-Iranic is the reconstructed proto-language of the Iranian languages branch of Indo-European language family and thus the ancestor of the Iranian languages such as Pashto, Persian, Sogdian, Zazaki, Ossetian, Mazandarani ...
''*arya-'' (meaning "
Aryan
Aryan or Arya (, Indo-Iranian *''arya'') is a term originally used as an ethnocultural self-designation by Indo-Iranians in ancient times, in contrast to the nearby outsiders known as 'non-Aryan' (*''an-arya''). In Ancient India, the term ' ...
", i.e. "of the Iranians"),
recognized as a derivative of
Proto-Indo-European language
Proto-Indo-European (PIE) is the reconstructed common ancestor of the Indo-European language family. Its proposed features have been derived by linguistic reconstruction from documented Indo-European languages. No direct record of Proto-Indo-E ...
', meaning "one who assembles (skilfully)". In the
Iranian languages
The Iranian languages or Iranic languages are a branch of the Indo-Iranian languages in the Indo-European language family that are spoken natively by the Iranian peoples, predominantly in the Iranian Plateau.
The Iranian languages are groupe ...
, the gentilic is attested as a self-identifier, included in ancient inscriptions and the literature of the
Avesta,
and remains also in other Iranian ethnic names ''
Alan'' ( os, Ир ) and ''
Iron
Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in fr ...
'' ().
According to the Iranian mythology, the country's name comes from the name of
Iraj, a legendary prince and shah who was killed by his brothers.
Historically, Iran has been referred to as ''Persia'' by
the West,
due mainly to the writings of
Greek
Greek may refer to:
Greece
Anything of, from, or related to Greece, a country in Southern Europe:
*Greeks, an ethnic group.
* Greek language, a branch of the Indo-European language family.
**Proto-Greek language, the assumed last common ancesto ...
historians who referred to all of Iran as (
Ancient Greek: Περσίς; from
Old Persian
Old Persian is one of the two directly attested Old Iranian languages (the other being Avestan) and is the ancestor of Middle Persian (the language of Sasanian Empire). Like other Old Iranian languages, it was known to its native speakers as (Ir ...
), meaning "land of the
Persians
The Persians are an Iranian ethnic group who comprise over half of the population of Iran. They share a common cultural system and are native speakers of the Persian language as well as of the languages that are closely related to Persian. ...
", while
Persis
Persis ( grc-gre, , ''Persís''), better known in English as Persia (Old Persian: 𐎱𐎠𐎼𐎿, ''Parsa''; fa, پارس, ''Pârs''), or Persia proper, is the Fars region, located to the southwest of modern-day Iran, now a province. Th ...
itself was one of the provinces of ancient Iran that is today known as
Fars.
As the most extensive interaction the
ancient Greeks had with any outsider was with the Persians, the term persisted, even long after the
Greco-Persian Wars
The Greco-Persian Wars (also often called the Persian Wars) were a series of conflicts between the Achaemenid Empire and Greek city-states that started in 499 BC and lasted until 449 BC. The collision between the fractious political world of the ...
(499–449 BC).
In 1935,
Reza Shah
,
, spouse = Maryam Savadkoohi Tadj ol-Molouk Ayromlu (queen consort) Turan AmirsoleimaniEsmat Dowlatshahi
, issue = Princess Hamdamsaltaneh Princess ShamsMohammad Reza Shah Princess Ashraf Prince Ali Reza Prince Gholam Reza Pri ...
requested the international community to refer to the country by its native name, ''Iran'', on
Nowruz
Nowruz ( fa, نوروز, ; ), zh, 诺鲁孜节, ug, نەۋروز, ka, ნოვრუზ, ku, Newroz, he, נורוז, kk, Наурыз, ky, Нооруз, mn, Наурыз, ur, نوروز, tg, Наврӯз, tr, Nevruz, tk, Nowruz, ...
, falling on 21 March 1935 (Esfand 30, 1313), 4:43 pm Tehran time; effective 22 March (the Iranian New Year on Farvardin 1, 1314) that year. Opposition to the name change led to the reversal of the decision in 1959, and Professor
Ehsan Yarshater, editor of ''
Encyclopædia Iranica
''Encyclopædia Iranica'' is a project whose goal is to create a comprehensive and authoritative English language encyclopedia about the history, culture, and civilization of Iranian peoples from prehistory to modern times.
Scope
The ''Encyc ...
'', propagated a move to use ''Persia'' and ''Iran'' interchangeably. Today, both ''Iran'' and ''Persia'' are used in cultural contexts, while ''Iran'' remains mandatory in official state contexts.
Historical and cultural usage of the word ''Iran'' is not restricted to the modern state proper. "
Greater Iran
Greater Iran ( fa, ایران بزرگ, translit=Irān-e Bozorg) refers to a region covering parts of Western Asia, Central Asia, South Asia, Xinjiang, and the Caucasus, where both Iranian culture and Iranian languages have had a ...
" (''Irānzamīn'' or ''Irān e Bozorg'') refers to territories of the Iranian cultural and linguistic zones. In addition to modern Iran, it includes portions of the
Caucasus,
Anatolia,
Mesopotamia
Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the F ...
,
Afghanistan, and
Central Asia
Central Asia, also known as Middle Asia, is a region of Asia that stretches from the Caspian Sea in the west to western China and Mongolia in the east, and from Afghanistan and Iran in the south to Russia in the north. It includes the former ...
.
Pronunciation
The Persian pronunciation of ''Iran'' is . Common
Commonwealth English
The use of the English language in current and former member countries of the Commonwealth of Nations was largely inherited from British colonisation, with some exceptions. English serves as the medium of inter-Commonwealth relations.
Many ...
pronunciations of ''Iran'' are listed in the ''
Oxford English Dictionary
The ''Oxford English Dictionary'' (''OED'') is the first and foundational historical dictionary of the English language, published by Oxford University Press (OUP). It traces the historical development of the English language, providing a co ...
'' as and ,
while
American English dictionaries such as
Merriam-Webster
Merriam-Webster, Inc. is an American company that publishes reference books and is especially known for its dictionaries. It is the oldest dictionary publisher in the United States.
In 1831, George and Charles Merriam founded the company as ...
's provide pronunciations which map to ,
or likewise in ''
Random House Webster's Unabridged Dictionary
''Random House Webster's Unabridged Dictionary'' is a large American dictionary, first published in 1966 as ''The Random House Dictionary of the English Language: The Unabridged Edition''. Edited by Editor-in-chief Jess Stein, it contained 315,0 ...
'' as . The ''
Cambridge Dictionary
The ''Cambridge Advanced Learner's Dictionary'' (abbreviated ''CALD'') was first published in 1995 under the name ''Cambridge International Dictionary of English'', by the Cambridge University Press
Cambridge University Press is the ...
'' lists as the British pronunciation and as the American pronunciation. Similarly, Glasgow-based ''
Collins English Dictionary'' provides both
English English and American English pronunciations. The pronunciation guide from
Voice of America also provides .
The American English pronunciation may be heard in U.S. media. Max Fisher in ''
The Washington Post'' prescribed for ''Iran'', while proscribing . ''
The American Heritage Dictionary of the English Language'', in the dictionary's 2014 Usage Ballot, addressed the topic of the pronunciations of Iran and Iraq. According to this survey, the pronunciations and were deemed almost equally acceptable, while was preferred by most panelists participating in the ballot. With regard to the pronunciation, more than 70% of the panelists deemed it unacceptable. Among the reasons given by those panelists were that has "hawkish connotations" and sounds "angrier", "xenophobic", "ignorant", and "not... cosmopolitan". The pronunciation remains standard and acceptable, reflected in the entry for ''Iran'' in the American Heritage Dictionary itself, as well as in each of the other major dictionaries of American English.
History
Prehistory

The earliest attested archaeological artifacts in Iran, like those excavated at
Kashafrud
Kashafrud Basin(کشفرود) is an archaeological site in Iran, known for the Lower Palaeolithic artifacts collected there; these are the oldest-known evidence for human occupation of Iran.
Kashafrud includes a cluster of sites which are lo ...
and
Ganj Par
Ganj Par ( fa, گنج پر) is a Lower Paleolithic site located in the Gilan province in northern Iran.
Located on an old western terrace of the Sefīd-Rūd River, the site was discovered by a team of archaeologists from the Center for Paleolith ...
in northern Iran, confirm a human presence in Iran since the
Lower Paleolithic
The Lower Paleolithic (or Lower Palaeolithic) is the earliest subdivision of the Paleolithic or Old Stone Age. It spans the time from around 3 million years ago when the first evidence for stone tool production and use by hominins appears in ...
. Iran's
Neanderthal
Neanderthals (, also ''Homo neanderthalensis'' and erroneously ''Homo sapiens neanderthalensis''), also written as Neandertals, are an extinct species or subspecies of archaic humans who lived in Eurasia until about 40,000 years ago. While ...
artifacts from the
Middle Paleolithic
The Middle Paleolithic (or Middle Palaeolithic) is the second subdivision of the Paleolithic or Old Stone Age as it is understood in Europe, Africa and Asia. The term Middle Stone Age is used as an equivalent or a synonym for the Middle Pale ...
have been found mainly in the
Zagros
The Zagros Mountains ( ar, جبال زاغروس, translit=Jibal Zaghrus; fa, کوههای زاگرس, Kuh hā-ye Zāgros; ku, چیاکانی زاگرۆس, translit=Çiyakani Zagros; Turkish: ''Zagros Dağları''; Luri: ''Kuh hā-ye Zāgr ...
region, at sites such as
Warwasi
Warwasi is a Paleolithic rockshelter site located at north of Kermanshah in western Iran. It was excavated by Bruce Howe under direction of late Robert Braidwood in the 1960s. This site contains a rich archaeological sequence from Middle Pal ...
and
Yafteh.
From the tenth to the seventh millennium BC, early agricultural communities began to flourish in and around the Zagros region in western Iran, including
Chogha Golan,
Chogha Bonut, and
Chogha Mish.
The occupation of grouped hamlets in the area of
Susa
Susa ( ; Middle elx, 𒀸𒋗𒊺𒂗, translit=Šušen; Middle and Neo- elx, 𒋢𒋢𒌦, translit=Šušun; Neo-Elamite and Achaemenid elx, 𒀸𒋗𒐼𒀭, translit=Šušán; Achaemenid elx, 𒀸𒋗𒐼, translit=Šušá; fa, شوش ...
, as determined by
radiocarbon dating
Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon.
The method was d ...
, ranges from 4395–3955 to 3680–3490 BC. There are dozens of prehistoric sites across the
Iranian Plateau
The Iranian plateau or Persian plateau is a geological feature in Western Asia, Central Asia, and South Asia. It comprises part of the Eurasian Plate and is wedged between the Arabian Plate and the Indian Plate; situated between the Zagr ...
, pointing to the existence of ancient cultures and urban settlements in the fourth millennium BC.
[Iranian.ws, "Archaeologists: Modern civilization began in Iran based on new evidence", 12 August 2007. Retrieved 1 October 2007.](_blank)
During the
Bronze Age
The Bronze Age is a historic period, lasting approximately from 3300 BC to 1200 BC, characterized by the use of bronze, the presence of writing in some areas, and other early features of urban civilization. The Bronze Age is the second pri ...
, the territory of present-day Iran was home to several civilizations, including
Elam,
Jiroft, and
Zayanderud
Zayanderud ( fa, Zāyanderud, script=Latn, from "fertile" or "life giver", and "river"), also spelled as ''Zayandeh-Rood'' or ''Zayanderood'', is the largest river of the Iranian Plateau in central Iran.
Geography
The Zayandeh starts in ...
. Elam, the most prominent of these civilizations, developed in the southwest alongside those in
Mesopotamia
Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the F ...
, and continued its existence until the emergence of the Iranian empires. The advent of writing in Elam was paralleled to
Sumer
Sumer () is the earliest known civilization in the historical region of southern Mesopotamia (south-central Iraq), emerging during the Chalcolithic and early Bronze Ages between the sixth and fifth millennium BC. It is one of the cradles of ...
, and the
Elamite cuneiform was developed since the third millennium BC.
From the 34th to the 20th century BC, northwestern Iran was part of the
Kura-Araxes culture, which stretched into the neighboring
Caucasus and
Anatolia. Since the earliest second millennium BC,
Assyrians settled in swaths of western Iran and incorporated the region into their territories.
Classical antiquity

By the second millennium BC, the
ancient Iranian peoples
The Iranian peoples or Iranic peoples are a diverse grouping of Indo-European peoples who are identified by their usage of the Iranian languages and other cultural similarities.
The Proto-Iranians are believed to have emerged as a separate ...
arrived in what is now Iran from the
Eurasian Steppe, rivaling the native settlers of the region.
As the
Iranians dispersed into the wider area of
Greater Iran
Greater Iran ( fa, ایران بزرگ, translit=Irān-e Bozorg) refers to a region covering parts of Western Asia, Central Asia, South Asia, Xinjiang, and the Caucasus, where both Iranian culture and Iranian languages have had a ...
and beyond, the boundaries of modern-day Iran were dominated by
Median
In statistics and probability theory, the median is the value separating the higher half from the lower half of a data sample, a population, or a probability distribution. For a data set, it may be thought of as "the middle" value. The basic f ...
,
Persian, and
Parthian tribes.
From the late tenth to the late seventh century BC, the Iranian peoples, together with the "pre-Iranian" kingdoms, fell under the domination of the
Assyrian Empire, based in northern
Mesopotamia
Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the F ...
.
Under king
Cyaxares, the Medes and Persians entered into an alliance with
Babylonian ruler
Nabopolassar
Nabopolassar ( Babylonian cuneiform: , meaning "Nabu, protect the son") was the founder and first king of the Neo-Babylonian Empire, ruling from his coronation as king of Babylon in 626 BC to his death in 605 BC. Though initially only aimed at re ...
, as well as the fellow Iranian
Scythians
The Scythians or Scyths, and sometimes also referred to as the Classical Scythians and the Pontic Scythians, were an ancient Eastern
* : "In modern scholarship the name 'Sakas' is reserved for the ancient tribes of northern and eastern Centr ...
and
Cimmerians
The Cimmerians ( Akkadian: , romanized: ; Hebrew: , romanized: ; Ancient Greek: , romanized: ; Latin: ) were an ancient Eastern Iranian equestrian nomadic people originating in the Caspian steppe, part of whom subsequently migrated into Wes ...
, and together they attacked the Assyrian Empire. The civil war ravaged the Assyrian Empire between 616 and 605 BC, thus freeing their respective peoples from three centuries of Assyrian rule.
The unification of the Median tribes under king
Deioces in 728 BC led to the foundation of the Median Empire which, by 612 BC, controlled almost the entire territory of present-day Iran and eastern
Anatolia. This marked the end of the Kingdom of
Urartu as well, which was subsequently conquered and dissolved.

In 550 BC,
Cyrus the Great
Cyrus II of Persia (; peo, 𐎤𐎢𐎽𐎢𐏁 ), commonly known as Cyrus the Great, was the founder of the Achaemenid Empire, the first Persian empire. Schmitt Achaemenid dynasty (i. The clan and dynasty) Under his rule, the empire embraced ...
, the son of
Mandane
:
Mandana of Media (Old Iranian: ''Mandanā'') was a Shahbanu of Media and, later, the Queen consort of Cambyses I of Anshan and mother of Cyrus the Great, ruler of Persia's Achaemenid Empire.
Etymology
The name ''Mandane'' is a Latinized form ...
and
Cambyses I, took over the Median Empire, and founded the
Achaemenid Empire by unifying other city-states. The conquest of Media was a result of what is called the ''
Persian Revolt''. The