Population: 159,883 (July 2000 est.)

Age structure:
0-14 years: 48% (male 38,588; female 37,624)
15-64 years: 48% (male 37,216; female 39,959)
65 years and over: 4% (male 2,961; female 3,535) (2000 est.)

Population growth rate: 3.16% (2000 est.)

Birth rate: 42.98 births/1,000 population (2000 est.)

Death rate: 7.76 deaths/1,000 population (2000 est.)

Net migration rate: -3.62 migrant(s)/1,000 population (2000 est.)

Sex ratio:
at birth: 1.03 male(s)/female
under 15 years: 1.03 male(s)/female
15-64 years: 0.93 male(s)/female
65 years and over: 0.84 male(s)/female
total population: 0.97 male(s)/female (2000 est.)

Infant mortality rate: 50.41 deaths/1,000 live births (2000 est.)

Life expectancy at birth:
total population: 65.25 years
male: 63.84 years
female: 66.7 years (2000 est.)

Total fertility rate: 6.08 children born/woman (2000 est.)

Nationality:
noun: Sao Tomean(s)
adjective: Sao Tomean

Ethnic groups: mestico, angolares (descendants of Angolan slaves), forros (descendants of freed slaves), servicais (contract laborers from Angola, Mozambique, and Cape Verde), tongas (children of servicais born on the islands), Europeans (primarily Portuguese)

Religions: Christian 80% (Roman Catholic, Evangelical Protestant, Seventh-Day Adventist)

Languages: Portuguese (official)

Literacy:
definition: age 15 and over can read and write
total population: 73%
male: 85%
female: 62% (1991 est.)