India
total: 25.9 years
male: 25.4 years
female: 26.6 years (2010 est.)
Indonesia
total: 27.9 years
male: 27.4 years
female: 28.4 years (2010 est.)
Iran
total: 26.3 years
male: 26 years
female: 26.5 years (2010 est.)
Iraq
total: 20.6 years
male: 20.5 years
female: 20.8 years (2010 est.)
Ireland
total: 34.5 years
male: 34.1 years
female: 34.8 years (2010 est.)
Isle of Man
total: 42.3 years
male: 41.6 years
female: 43 years (2010 est.)
Israel
total: 29.3 years
male: 28.6 years
female: 30 years (2010 est.)
Italy
total: 43.7 years
male: 42.3 years
female: 45.3 years (2010 est.)
Jamaica
total: 23.9 years
male: 23.4 years
female: 24.5 years (2010 est.)
Japan
total: 44.6 years
male: 42.9 years
female: 46.5 years (2010 est.)