Population:
81,160,000 (2017 est.) 

Age structure:
0-14 years: 29.3% (male 10,279,588; female 9,727,668) 
15-64 years: 65.9% (male 22,916,431; female 22,095,124) 
65 years and over: 4.8% (male 1,625,113; female 1,634,902) (2003 est.) 

Median age:
total: 22.9 years 
male: 22.7 years 
female: 23.2 years (2002) 

Population growth rate:
1.08% (2003 est.) 

Birth rate:
17.23 births/1,000 population (2003 est.) 

Death rate:
5.54 deaths/1,000 population (2003 est.) 

Net migration rate:
-0.86 migrant(s)/1,000 population (2003 est.) 

Sex ratio:
at birth: 1.05 male(s)/female 
under 15 years: 1.06 male(s)/female 
15-64 years: 1.04 male(s)/female 
65 years and over: 0.99 male(s)/female 
total population: 1.04 male(s)/female (2003 est.) 

Infant mortality rate:
total: 44.17 deaths/1,000 live births 
female: 44.02 deaths/1,000 live births (2003 est.) 
male: 44.31 deaths/1,000 live births 

Life expectancy at birth:
total population: 69.35 years 
male: 68.04 years 
female: 70.73 years (2003 est.) 

Total fertility rate:
1.99 children born/woman (2003 est.) 

HIV/AIDS – adult prevalence rate:
less than 0.1% (2001 est.) 

HIV/AIDS – people living with HIV/AIDS:
20,000 (2001 est.) 

HIV/AIDS – deaths:
290 (2001 est.) 

Nationality:
noun: Iranian(s) 
adjective: Iranian 

Ethnic groups:
Persian 51%, Azeri 24%, Gilaki and Mazandarani 8%, Kurd 7%, Arab 3%, Lur 2%, Baloch 2%, Turkmen 2%, other 1%

Religions:
Shi’a Muslim 89%, Sunni Muslim 10%, Zoroastrian, Jewish and Christian 1% 

Languages:
Persian and Persian dialects 58%, Turkic and Turkic dialects 26%, Kurdish 9%, Luri 2%, Balochi 1%, Arabic 1%, Turkish 1%, other 2% 

Literacy:
definition: age 15 and over can read and write 
total population: 79.4% 
male: 85.6% 
female: 73% (2003 est.)