In 1800, the population of the modern-day territory of Iran was approximately 6.3 million. This figure would see modest growth throughout the 19th century, as several wars and a mass famine in 1870-1871 (modern estimates put its death toll at around 1.5 million people) were largely balanced out by a surge in migration to Iran; this migration came as the Russian Empire expanded into the Caucuses, and caused a wave of refugees to flee southwards to avoid forced expulsion and ethnic cleansing in the North Caucasus region, particularly from 1864 onwards. As a result, the population of Iran reached ten million by the turn of the 20th century.

Twentieth century growth Iran’s population would begin to grow rapidly in the 20th century, as the discovery of oil in the country in 1908 led to an economic boom, and the socio-economic reforms implemented under Reza Shah would see a number of medical and healthcare advancements across the country. Although unpopular with religious fundamentalists, Reza Shah's reforms had long-term influence on the demographic development of Iran, even after his abdication in 1941. Following the Second World War, Iran became increasingly westernized and developed relatively strong relations with the U.S.; however, western influence, economic imbalances and the oppression of the Mohammed Reza Shah's regime became the driving forces behind the Iranian Revolution, which was one of the most significant moments in the history of the region.

Growth after the Revolution The 1979 Iranian Revolution saw the removal of the Shah and an end to Iran's so called westernization; the monarchy was replaced by an Islamic, theocratic regime led by the Supreme Leader, Ayatollah Ruhollah Khomeini. During Khomeini's decade in charge he oversaw Iran's transition into an Islamic Republic, which implemented radical political and cultural changes in the country, and this coincided with an increased population growth rate in the 1980s. This growth was promoted by the Iranian government, who encouraged a baby boom during the Iran–Iraq War between 1980 and 1988, as part of an effort to increase future Iranian military manpower. As a result of this strategy, the population of Iran would grow from approximately 38.6 million in 1980 to over 56 million just a decade later. Following the implementation of a UN-brokered ceasefire in 1988, population growth in Iran would slow, as economic sanctions and government implementation of family planning policies would lead to a drop in fertility. Population growth has continued steadily into the 21st century, however, and in 2020, Iran is estimated to have a population of 84 million.

In 2020, around **** percent of the Iranian population identified as Muslim. Around ** percent identified as Shia Muslims in the same year, while a much smaller share followed the Sunni Muslim religion. In Iran, most Sunni Muslims belong to ethnic minority groups. Iran’s demographics The total population in Iran has grown steadily and is expected to surpass ** million in 2028. The vast majority of the population in the country was between 15 and 64 years of age. At the same time, the share of people aged above 64 increased in recent years and constituted over ***** percent of the total population. Muslim population worldwide In Europe, it was estimated that the Muslim population could triple by the middle of the century. In Southeast Asia, Indonesia had the largest share of Muslims as a proportion of its population. On the African continent, the highest number of Muslims was estimated in Nigeria, with close to a hundred million Islam followers. In the United States, less than one percent of the population identified as Muslims.

Population for Islamic Republic of Iran was 82.91391 Mil. of Persons in January of 2019, according to the United States Federal Reserve. Historically, Population for Islamic Republic of Iran reached a record high of 82.91391 in January of 2019 and a record low of 18.49549 in January of 1955. Trading Economics provides the current actual value, an historical data chart and related indicators for Population for Islamic Republic of Iran - last updated from the United States Federal Reserve on July of 2025.

Population Ages 0 to 14 for the Islamic Republic of Iran was 22.83878 % of Total in January of 2023, according to the United States Federal Reserve. Historically, Population Ages 0 to 14 for the Islamic Republic of Iran reached a record high of 46.15673 in January of 1987 and a record low of 22.83878 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Ages 0 to 14 for the Islamic Republic of Iran - last updated from the United States Federal Reserve on June of 2025.

Population Growth for the Islamic Republic of Iran was 1.20408 % Chg. at Annual Rate in January of 2023, according to the United States Federal Reserve. Historically, Population Growth for the Islamic Republic of Iran reached a record high of 4.13505 in January of 1983 and a record low of 0.83103 in January of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Growth for the Islamic Republic of Iran - last updated from the United States Federal Reserve on July of 2025.

Population Ages 15 to 64 for the Islamic Republic of Iran was 69.24513 % of Total in January of 2023, according to the United States Federal Reserve. Historically, Population Ages 15 to 64 for the Islamic Republic of Iran reached a record high of 70.93401 in January of 2012 and a record low of 50.73188 in January of 1988. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Ages 15 to 64 for the Islamic Republic of Iran - last updated from the United States Federal Reserve on June of 2025.

In 1800, the region of present-day Iraq had an estimated population of just over one million people. The population of Iraq would grow slowly throughout the 19th century, reaching just over two million by the beginning of the 20th century. However, Iraq’s population would begin to rise rapidly in the 1920s, as modernization programs implemented by the British administration, aided by the discovery of oil in 1927, would see mortality rates fall and living standards rise for much of the country. As a result, Iraq would grow to have a population of just under seven million by the time of the Iraqi Republic's establishment in 1958. Population growth would continue to increase following the creation of the republic, doubling to fourteen million by the 1980s; according to these estimates, the Iran-Iraq War of the 1980s did little to change the trajectory of Iraq's population growth, nor did the Gulf War of 1990-1991, despite Iraq suffering up to half a million fatalities in these conflicts. Iraq's population growth did slow in the early 2000s however, with the U.S.-led invasion of Iraq in 2003. While the initial invasion would see relatively few casualties (compared to previous conflicts), the resulting economic turmoil and political instability, combined with the rise of the Iraqi insurgency and civil war in the region, would cause population growth to slow for several years. Population growth would recover starting in the 2010s, and by 2020, Iraq is estimated to have a population of just over forty million.

Iran, Islamic Republic of - Population, Total for Islamic Republic of Iran was 90608707.00000 Persons in January of 2023, according to the United States Federal Reserve. Historically, Iran, Islamic Republic of - Population, Total for Islamic Republic of Iran reached a record high of 90608707.00000 in January of 2023 and a record low of 21906914.00000 in January of 1960. Trading Economics provides the current actual value, an historical data chart and related indicators for Iran, Islamic Republic of - Population, Total for Islamic Republic of Iran - last updated from the United States Federal Reserve on June of 2025.

Iran, Islamic Republic of - Population ages 65 and above for the Islamic Republic of Iran was 7.91608 % of Total in January of 2023, according to the United States Federal Reserve. Historically, Iran, Islamic Republic of - Population ages 65 and above for the Islamic Republic of Iran reached a record high of 7.91608 in January of 2023 and a record low of 2.85986 in January of 1984. Trading Economics provides the current actual value, an historical data chart and related indicators for Iran, Islamic Republic of - Population ages 65 and above for the Islamic Republic of Iran - last updated from the United States Federal Reserve on July of 2025.

With nearly 49,000 living in Denmark as of January 1, 2024, most immigrants were from Poland. The second and third largest groups of immigrants were from Ukraine and Romania, amounting to roughly 41,000 and 40,000 people, respectively. Tightening immigration policies Like many European countries, Denmark experienced a heightened influx of immigrants in 2015. In the wake of the refugee situation, however, the number of immigrants, notably asylum seekers, declined in part due to sharpened immigration policies. In 2015, over 21,000 refugees applied for asylum in Denmark, whereas applications fell below 5,000 in 2022. Residence permits Among the different types of residence permits, permits granted based on asylum were the least delivered type of permit. Only 1,400 people were granted asylum in Denmark in 2022. The highest number of asylum seekers came from Ukraine, even when excluding Ukrainians arriving via the temporary protection act. In 2022, Denmark registered around 2,000 applications from Ukrainians.