Iranian citizenship, Persian cultural identity and the Iranian language family are different categories. Understanding the distinction makes it easier to discuss Iran’s diverse population and the evidence for its historical dynasties.

Rows of Parthian inscription carved into pale, weathered stone, with cracks crossing the lettering
The Parthian-language version of Shapur I’s inscription at Ka’ba-ye Zartosht, photographed by TruthBeethoven on 24 June 2010. The monument preserves royal language and claims of rule; it is not a census of ethnic identities. © TruthBeethoven, 2010 · CC BY-SA 3.0 · Wikimedia Commons.

The short answer: the terms have different meanings

No: being Iranian does not require being Persian. In a citizenship context, Iranian refers to membership of the modern state of Iran, whose population includes different ethnic and linguistic communities. Persian can identify a language or an ethnocultural identity, depending on context. Speaking Persian as a shared public language does not, by itself, determine someone’s ethnic self-identification. People of Persian cultural background can also live abroad and hold other citizenships. The first step is to establish whether a claim concerns citizenship, language, cultural belonging or ancestry. [1] [2]

Three uses that should be kept distinct
Term in contextWhat it describesExample
Iranian citizenshipLegal membership of a modern stateA Kurdish citizen of Iran can be Iranian and Kurdish.
Iranian languageA linguistic family relationshipKurdish, Persian and Pashto are distinct Iranian languages.
Persian language or identityA language, or an ethnocultural identityUsing Persian as a second language does not automatically determine ethnicity.

Iranian languages extend beyond Iran’s borders

In linguistics, Iranian names a branch of the Indo-European family. Persian, Kurdish, Baluchi, Pashto and Ossetic are examples within it; the label does not mean that their speakers all hold Iranian passports. Skjærvø distinguishes Old, Middle and Modern Iranian languages and identifies Old, Middle and New Persian as successive stages of Persian. Modern Persian also has varieties associated with Iran, Afghanistan and Central Asia, commonly called Farsi, Dari and Tajiki. Language names, national standards and ethnic identities therefore do not form a simple one-to-one map. Shared linguistic ancestry establishes a relationship between languages, not the citizenship of each speaker. [2] [3]

What the constitution says about language and groups

Article 15 of Iran’s Constitution makes Persian the official shared language and script. It also allows regional and tribal languages in the press and mass media and the teaching of their literature alongside Persian. Article 19 states equality irrespective of ethnic group or tribe and lists language among characteristics that should confer no privilege. These provisions explicitly distinguish a shared official language from the existence of different communities. The wording is a constitutional statement; assessing how it is implemented requires additional evidence about schools, media and public institutions. [1]

Why an exact ethnic percentage needs a method

In its 2024 concluding observations, the UN Committee on the Elimination of Racial Discrimination noted that Iran’s 2016 census did not gather ethnic composition through self-identification. It recommended reliable, updated and comprehensive data. Consequently, an ethnic percentage should not be presented as an official self-identification census result without showing the dataset. An estimate based on first language, home language, survey identity or an author’s regional assumptions can produce different categories. A claim that Persians are a particular majority or minority needs a dated source and an explanation of what was counted. [4]

Ancient names and the Sasanian evidence

The name Ērān is first attested in Ardashir I’s royal titles, according to MacKenzie’s study of inscriptions and coins. That evidence belongs to the third century CE; it does not establish that the modern national name was already used identically before the Greeks wrote about Persia. Shahbazi describes the Sasanian ruling house as a Persian lineage whose rise was rooted in Fars. Shapur I’s inscription names his father Ardashir and grandfather Papak and lists lands he claimed to rule. Its Middle Persian, Parthian and Greek versions show a multilingual imperial setting. A ruler’s origins, a royal title and the many peoples governed by an empire answer different questions. [5] [6] [7]

Medes, Safavids and claims of exclusive inheritance

Schmitt explains that Median survives only fragmentarily and that a direct linguistic derivation of Kurdish from Median cannot be established by unambiguous diagnostic developments. This does not erase possible regional ancestry; it limits the certainty of a particular linguistic claim. For a much later dynasty, Matthee discusses the Safavids’ Kurdish ancestry, the order from which they emerged, Turkmen military support and Persian administrative culture. Those strands can be studied together. One ancestral connection does not convert every institution, subject or period of an empire into a single modern ethnic history. Evidence for Kurdish participation can be specific without assigning the majority of all Iranian history to one people. [8] [9]

What a DNA estimate can and cannot establish

Consumer ancestry reports compare genetic variants with reference databases. The US National Library of Medicine explains that different companies use different databases and methods, that populations are represented unevenly and that estimates can change. Such reports do not provide one universal percentage of “Persian DNA” shared by all Persian people. Nor can a consumer category settle a medieval ruler’s documented language or identify every subject of an ancient empire. Family history, cultural experience, self-identification and genetic estimates are related kinds of information, but they should not be treated as interchangeable measurements. [10]

Sources and further reading

  1. Constitution of the Islamic Republic of Iran (1979, revised 1989), Articles 15 and 19; primary text in English translation, hosted by Constitute.
  2. Prods Oktor Skjærvø, “Iran vi. Iranian Languages and Scripts (2): Documentation”, Encyclopaedia Iranica; Old, Middle and Modern Iranian languages and the continuity of Persian.
  3. “Tajik iii. Colloquial Tajiki in Comparison with Persian of Iran”, Encyclopaedia Iranica; Farsi, Dari and Tajiki and their regional varieties.
  4. UN Committee on the Elimination of Racial Discrimination, CERD/C/IRN/CO/20–27 (19 September 2024), paragraphs 4–5; primary finding on 2016 census data and self-identification.
  5. David Neil MacKenzie, “Ērān, Ērānšahr”, Encyclopaedia Iranica VIII, p. 534; dated royal titles, coins and historical usage.
  6. Alireza Shapur Shahbazi, “Sasanian Dynasty”, Encyclopaedia Iranica; rise of the dynasty in Fars and documentary evidence.
  7. Sasanika, University of California, Irvine, “Šāpūr I’s inscription, Ka’ba-ye Zartošt (ŠKZ)”; primary inscription, transcription and English translation, especially the opening genealogy and territorial list.
  8. Rüdiger Schmitt, “Median Language”, Encyclopaedia Iranica (2021); fragmentary evidence and limits on establishing direct descent of modern languages.
  9. Rudi Matthee, “Safavid Dynasty”, Encyclopaedia Iranica; dynastic ancestry, Sufi origins, military supporters and administration.
  10. US National Library of Medicine, MedlinePlus Genetics, “What is genetic ancestry testing?”; reference databases, changing estimates and the limits of genetic descriptions of identity.
  11. TruthBeethoven, Parthian version of Shapur I’s inscription, 24 June 2010, Wikimedia Commons; CC BY-SA 3.0.