21.5 years (2004 est.)

Kazakhstan
total: 28.3 years
male: 26.6 years
female: 30 years (2004 est.)

Kenya
total: 18.6 years
male: 18.5 years
female: 18.7 years (2004 est.)

Kiribati
total: 19.8 years
male: 19.4 years
female: 20.3 years (2004 est.)

Korea, North
total: 31.4 years
male: 30.2 years
female: 32.6 years (2004 est.)

Korea, South
total: 33.7 years
male: 32.8 years
female: 34.7 years (2004 est.)

Kuwait
total: 25.9 years
male: 28.2 years
female: 22 years (2004 est.)

Kyrgyzstan
total: 23.1 years
male: 22.2 years
female: 24 years (2004 est.)

Laos
total: 18.6 years
male: 18.3 years
female: 19 years (2004 est.)

Latvia
total: 38.8 years
male: 35.6 years
female: 41.9 years (2004 est.)

Lebanon
total: 26.9 years
male: 25.9 years
female: 27.9 years (2004 est.)

Lesotho
total: 20 years
male: 19.5 years
female: 20.6 years (2004 est.)

Liberia
total: 18.1 years
male: 17.7 years
female: 18.4 years (2004 est.)

Libya
total: 22.4 years
male: 22.5 years
female: 22.2 years (2004 est.)

Liechtenstein
total: 38.8 years
male: 38.3 years
female: 39.3 years (2004 est.)

Lithuania
total: 37.4 years
male: 34.8 years
female: 40.1 years (2004 est.)

Luxembourg
total: 38.3 years
male: 37.4 years
female: 39.3 years (2004 est.)

Macau
total: 35.2 years
male: 34.9 years
female: 35.4 years (2004 est.)

Macedonia
total: 32.8 years
male: 31.7 years
female: 33.9 years (2004 est.)

Madagascar
total: 17.4 years
male: 17.2 years
female: 17.7 years (2004 est.)

Malawi
total: 16.4 years
male: 16.1 years
female: 16.7 years (2004 est.)

Malaysia
total: 23.8 years
male: 23.2 years
female: 24.4 years (2004 est.)

Maldives
total: 17.5 years
male: 17.4 years
female: 17.6 years (2004 est.)

Mali
total: 16.3 years
male: 15.7 years
female: 16.9 years (2004 est.)

Malta
total: 38 years
male: 36.6 years
female: 39.5 years (2004 est.)

Man, Isle of
total: 39.3 years
male: 38 years
female: 40.8 years (2004 est.)

Marshall Islands
total: 19.6 years
male: 19.6 years
female: 19.6 years (2004 est.)

Martinique
total: 33.1 years
male: 32.5 years
female: 33.8 years (2004 est.)

Mauritania
total: 16.9 years
male: 16.7 years
female: 17.2 years (2004 est.)

Mauritius
total: 30.1 years
male: 2