Samoa
total: 25.2 years
male: 28.1 years
female: 22 years (2006 est.)
San Marino
total: 40.6 years
male: 40.3 years
female: 41 years (2006 est.)
Sao Tome and Principe
total: 16.2 years
male: 15.6 years
female: 16.8 years (2006 est.)
Saudi Arabia
total: 21.4 years
male: 22.9 years
female: 19.4 years (2006 est.)
Senegal
total: 19.1 years
male: 18.9 years
female: 19.3 years (2006 est.)
Serbia
total: 40.4 years
male: 39.1 years
female: 41.7 years
Seychelles
total: 28.1 years
male: 27 years
female: 29.1 years (2006 est.)
Sierra Leone
total: 17.4 years
male: 17.1 years
female: 17.7 years (2006 est.)
Singapore
total: 37.3 years
male: 36.9 years
female: 37.6 years (2006 est.)
Slovakia
total: 35.8 years
male: 34.2 years
female: 37.6 years (2006 est.)