Largest pistachio producer, output of 230,000 tons^[46]

Agriculture

2007

Largest saffron producer, 93.7% of world's total production^[47]

Agriculture

2009

Largest caviar producer ^[48]

Agriculture

2009

Largest producer of berries^[49]

Agriculture

2007

Largest producer of stone fruits^[50]

Agriculture

2007

Largest producer of Berberis^[51]

Agriculture

2009

Hottest surface temperature ever recorded, 70.7 °C (159 °F) recorded at Dasht-e Lut^[52]

Climate

2005

Most number of people killed in a blizzard, 4000 people died in 1972 Iran blizzard

Climate

1972

Largest importer of wheat^[53][54][55]

Consumption

2009

Highest rate of brain drain in the world

Demographics

2003

Highest ratio of female to male school enrollment^[56], 1.22 female per male student

Education

2005

Location with the highest natural background radiation, annual dose of 260 mSv

Geography

2010

Most number of major earthquakes, 5.5+ Richter Magnitude^[57]

Geology

2010

Most accurate calendar in use, Iranian calendar

Geophysics

2010

Highest annual prevalence of opiates use, 2.8% of population

Health

1999

Largest number of former national capitals, 31 former capital cities

History

2010

World's oldest country, Established ~3200 BC

History

2010

Host to the world's largest population of foreign refugees, Mostly Iraqi & Afghan refugees^{[58][59][60][61]}

Humanitarian

1999

Largest producer of Turquoise^[62][63]

Industry

2010

Largest reserves of Zinc^[64][65][66]

Industry

2010

World's largest producer and exporter of handmade carpets^[67][68][69]

Industry

2010