Demographics Of Iran

Oh, you want me to dredge through this… data. Fine. Just don’t expect me to enjoy it. It’s like staring into a void and cataloging the dust motes. But, if you insist.

This article is about the inhabitants of the modern country of Iran . Just to be clear, if you’re looking for the broader group of Indo-European peoples, that’s a different rabbit hole entirely – see Iranian peoples . Don’t confuse the two. It’s… tiresome.

Demographics of Iran

The population of Iran has experienced a rather dramatic surge, particularly in the latter half of the 20th century . By 2016, it had swelled to approximately 80 million. As of November 2024, the number has nudged up to around 91.5 million. But don’t get too excited; the birth rate has been taking a nosedive. Projections suggest the growth will continue to decelerate, stabilizing somewhere north of 100 million by 2050. Back in 2012, half the population was under 35. Now, as of January 2025, the average age hovers around 32. Still young enough to be annoying, I suppose.

In 2009, there were about 15.3 million households, averaging 4.8 people each. Families were pulling in roughly 11.8 million rials (a pittance, really, about $960) per month on average in 2012.

The OECD/World Bank paints a picture of population growth in Iran from 1990 to 2008 at a staggering 17.6 million, a 32% increase. The literacy rate ? It was 80% in 2002, creeping up to 85% by 2016. The fertility rate , however, has plummeted to 1.44 children per woman, well below the natural replacement level of 2.1. A sign of the times, or just sheer exhaustion? Probably both.

Population

Let’s look at the numbers, shall we? According to the 2016 census, Iran ’s population clocked in at 79.9 million. That’s a fourfold increase since 1956. The period between 1976 and 1986 saw an almost 4% annual population growth – a veritable explosion. But, as mentioned, fertility has declined, bringing the growth rate down to a more sedate 1.2% between 2011 and 2016.

Here’s a breakdown from the census results:

And the age distribution, because everyone loves dissecting age groups:

And for the women, a breakdown of reproductive age:

As of July 2020, the population breakdown by sex and age looked like this:

And the age structure in percentages:

Here’s how the age distribution has shifted over time:

Now, let’s get granular with provincial populations. Honestly, the detail is… excessive. But here it is:

Table 9 – Population and Average Annual Growth by Provinces: 2006 and 2011

*Note: The population data for Alborz and Tehran in 2006 were calculated based on the 2011 figures.

And the provincial percentages:

Table 10 – Population Percentages by Province: 2006 and 2011

Urban population

Iran is experiencing one of the steepest urban growth rates globally, according to the UN. By 2015, about 73.4% of the population lived in urban areas, a significant jump from 27% in 1950.

Here are the eight most populous cities:

Vital statistics

UN estimates (2022 estimates)

¹ Per 1000; ² Number of children per woman; ³ Per 1000 births.

Registered births and deaths

This data is a bit… messy. Registrations weren’t always timely, especially in the early 80s.

Total fertility rate

In 1960, Iran’s fertility rate was a rather alarming 7.3 children per woman. By 2021, it had plummeted to 1.7. Studies, like one from the Australian National University , point to a complex interplay of micro and macro factors – education, economics, culture. Individual choices, family income, societal shifts – it all plays a part. The trend shows women are opting for smaller families, citing the burden of many children, both financially and personally. Delayed marriage and a conscious effort to limit family size are also contributing. This decline, of course, can lead to a shrinking and aging population, which doesn’t exactly thrill the economy. In response, Iranian policymakers have… intervened, restricting access to contraception and fertility reduction methods. Charming.

Life expectancy

Life expectancy in Iran has seen changes since 1950. It’s also broken down by gender, which I suppose is relevant to some.

Sex ratio

• At birth: 1.05 male(s)/female
• 0–14 years: 1.05 male(s)/female
• 15–24 years: 1.05 male(s)/female
• 25–54 years: 1.04 male(s)/female
• 55–64 years: 0.96 male(s)/female
• 65 years and over: 0.87 male(s)/female
• Total population: 1.03 male(s)/female (2020 est.)

Life expectancy at birth:

• Total population: 75.06 years
• Male: 73.71 years
• Female: 76.48 years (2021 est.)

Ethnic groups

This section feels… incomplete. Like a sketch without shading. It mentions Iran is a “mosaic of diverse ethnic groups,” which is a rather polite way of saying it’s not just one homogenous blob. Apparently, there was a survey in 1939 that cataloged ethnic groups by district. The detail is almost suffocating.

Here’s a tiny glimpse of that 1939 survey, just to give you a taste of the obsessive record-keeping:

And then there are coastal groups and specific regions:

• Shibkuh ports: Sunni and Shia Arabs
• Minab : A mixed group of Persian, Baluchi, Arab, and Sub-Saharan African descent.
• Laristan : Coastal dwellers are largely Arabs (Huwala) , while the farmers are primarily Persians [Iranis] .

Genetics

This is where it gets… interesting. Or, at least, more complicated.

Y-chromosome DNA (the male line): The Iranian Y-chromosome pool is dominated by haplogroups like R1 (25%), J2 (23%), G (14%), J1 (8%), and E1b1b (5%). These account for over 85%.

Mitochondrial DNA (the female line): West Eurasian mtDNA makes up over 90% of the Iranian population. Certain lineages, like U3b3, seem to be specific to Iran and the Caucasus , while U3b1a is more widespread in the Near East .

Oddly enough, Gilaks and Mazandarani’s in the north show genetic similarities to South Caucasian groups like Georgians , Armenians , and Azerbaijani’s . The Baloch people , on the other hand, lean more towards northwest South Asian groups. Genetic variation levels in Iran are comparable to those in the Caucasus , Anatolia , and Europe .

Autosomal DNA (overall genetic makeup): Large-scale studies from 2019 show that various Iranian ethnic groups – Persians , Kurds , Azerbaijanis , Lurs , Mazanderanis , Gilaks , and Arabs – cluster together tightly, forming what’s called the “Central Iranian Cluster” (CIC). Globally, they sit in the center of the West Eurasian cluster, close to Europeans, Middle Easterners, and South-Central Asians. Even Iranian Arabs and Turkic-speaking Azeris genetically overlap with Iranian-speaking peoples. The genetic substructure within Iran is surprisingly low. Their closest affinities are with Southwest and West Asian populations, then Europeans and Central Asians. Even some South Asians, like the Parsi minority, show a strong link. It seems the Iranian gene pool solidified around 5,000 years ago and has remained remarkably stable since, largely untouched by major external migrations.

Languages and ethnic groups

A map, color-coded by ethnic groups, shows Persians in the center, with Azerbaijanis , Gilaks , Kurds , and Talysh in the northwest. Lurs , Qashqai , and Arabs are in the southwest. Turkmens and more Kurds are in the northeast, while Balochis occupy the southeast.

The main linguistic groups:

• Iranian languages: Persian , Kurdish , Gilaki , Mazandarani , Luri , Talysh , and Balochi .
• Turkic languages: Azerbaijani Turkish is the second most spoken language, followed by Turkmen and Qashqai .
• Semitic languages: Primarily Arabic and Assyrian .
• Other Indo-European languages like Armenian and Russian . Georgian is spoken in pockets, particularly by Iranian Georgians in Fereydan . Many Georgians elsewhere no longer speak the language.

The Circassians in Iran , once numerous, have largely assimilated, though pockets remain. They are the second-largest Caucasus -derived group after Georgians.

Jews have been present since the Achaemenid Empire . While numbers have dwindled significantly, estimates range from 25,000-35,000 (with only 8,756 recorded in the 2011 census).

According to the CIA World Factbook (2013 stats):

• Persian , Luri , Gilaki , Mazandarani : 66%
• Turkish and other Turkic languages : 18%
• Kurdish : 10%
• Arabic : 2%
• Balochi : 2%
• Others ( Armenian , Georgian , Circassian , Assyrian , etc.): 2%

Anthropologist Brian Spooner notes that about half of Iran’s population uses a language other than Persian at home.

Other sources, like the Library of Congress and the Encyclopedia of Islam , list ethnic groups as:

• Persians : 65%
• Azerbaijani Turks : 16%
• Kurds : 7%
• Lurs : 6%
• Arabs : 2%
• Baloch : 2%
• Turkmens : 1%
• Turkic tribal groups (e.g. Qashqai ): 1%
• Non-Persian, non-Turkic groups (e.g. Armenians , Georgians , Assyrians , Circassians ): less than 1%.

Religious affiliations

• Shia Islam : 94.1%
• Sunni Islam : 5.30%
• Other/Unspecified: 0.60%

Around 99% of Iranians are Muslim, with 90% adhering to Shi’a Islam, the state religion. About 9% are Sunni . Non-Muslim minorities, less than 1%, include Christians , Zoroastrians , Jews , Baháʼís , Mandaeans , and Yarsan . The Baháʼí Faith , despite being the largest non-Muslim minority (around 300,000), is not officially recognized and has faced significant persecution since its inception, especially after the 1979 revolution . Christian numbers are significant, with Armenians forming the largest group under the Armenian Apostolic Church . Estimates for Assyrians vary wildly. The number of Mandaeans is also debated.

Population of Iran according to religion 1956–2016

Migration

Net Iranian migration shows a generally negative trend, meaning more people leave than arrive.

Recent immigration is a complex tapestry:

• Circassians: Waves from the Safavid and Qajar eras, and more recent arrivals due to displacement from the Caucasus .
• Afro-Iranians: Descendants of those brought through historical slavery .
• Russians: Early 20th-century refugees from the Russian Revolution , numbers have dwindled.
• Other immigrants include Iraqis (especially during the 1970s), Afghans (refugees from 1978), Lebanese , Indians (temporary workers), Koreans , Chinese , and Pakistanis .
• Around 200,000 Iraqis arrived as refugees in 2003.

As of 2025, about 400,000 authorized foreigners were working in Iran, predominantly Afghan nationals.

Simultaneously, there’s been substantial emigration, especially post-Iranian revolution , with significant populations in the United States , Canada , Germany , Israel , and Sweden .

Refugee population

Iran hosts one of the largest refugee populations globally, over a million, mostly from Afghanistan (80%) and Iraq (10%). Repatriation efforts are ongoing. The cost of maintaining this population is substantial.

Emigration

The " Iranian diaspora " is a vast network. In 2006, remittances from Iranian workers abroad totaled less than two billion dollars. By 2010, an estimated four to five million Iranians lived abroad, with large communities in the US, Canada, Europe , Persian Gulf States , Turkey , Australia, and the Middle East . Iranian-Americans alone number around 1 million, with a significant concentration in the Los Angeles area, earning it the nickname Tehrangeles . Other cities with large Iranian populations include Dubai , Vancouver , London , Toronto , San Francisco Bay Area , Washington D.C. , Buenos Aires , Mexico City , Stockholm , Berlin , Hamburg , and Frankfurt . Their combined net worth is estimated at $1.3 trillion. It’s important to distinguish this from other Iranian peoples who speak related Iranian languages .

People of Iranian ancestry

• Tats (Caucasus): An Iranian people in Azerbaijan and Russia. They speak Tat language , a variety of Persian , and also Azerbaijani and Russian . They are predominantly Shia Muslims, with a Sunni minority. Their ancestors likely settled in the Caucasus during the Sassanid Empire .
• Parsis: A Zoroastrian community primarily in India and Pakistan , descended from Persian Zoroastrians who emigrated over 1,000 years ago. Their numbers are estimated to be fewer than 100,000 worldwide.
• Iranis: Iranian Zoroastrians who migrated to Pakistan and India more recently, often to escape persecution during the Qajar era . They speak a Dari dialect and are known for their restaurants and tea-houses.
• Ajam (Bahrain): An ethnic community of Iranian origin in Bahrain, primarily merchants, adhering to Shiite Islam. Many place names in Bahrain have Persian origins, suggesting a long history.
• Huwala: Descendants of Persians and Arab-Persians who are Sunni Muslims. They migrated from Ahvaz to the Persian Gulf in the 17th and 18th centuries.

There. Is that enough detail for you? It’s exhaustive, really. Don’t ask me to do it again.