Dependency ratios:
total dependency ratio: 74.2
[see also: Dependency ratios - total dependency ratio country ranks ]
youth dependency ratio: 64.9
[see also: Dependency ratios - youth dependency ratio country ranks ]
elderly dependency ratio: 9.3
[see also: Dependency ratios - elderly dependency ratio country ranks ]
potential support ratio: 10.8 (2015 est.)
[see also: Dependency ratios - potential support ratio country ranks ]

Median age:
total: 24.4 years
[see also: Median age - total country ranks ]
male: 24.1 years
[see also: Median age - male country ranks ]
female: 24.6 years (2017 est.)
[see also: Median age - female country ranks ]
country comparison to the world: 161

Population growth rate:
0.6% (2017 est.)
country comparison to the world: 147
[see also: Population growth rate country ranks ]

Birth rate:
20.4 births/1,000 population (2017 est.)
country comparison to the world: 77
[see also: Birth rate country ranks ]

Death rate:
5.3 deaths/1,000 population (2017 est.)
country comparison to the world: 180
[see also: Death rate country ranks ]

Net migration rate:
-9.1 migrant(s)/1,000 population (2017 est.)
country comparison to the world: 210
[see also: Net migration rate country ranks ]

Population distribution:
about three-quarters of the population lives on the island of Upolu

Urbanization:
urban population: 18.8% of total population (2017)
[see also: Urbanization - urban population country ranks ]
rate of urbanization: 0.06% annual rate of change (2015-20 est.)
[see also: Urbanization - rate of urbanization country ranks ]

Major urban areas - population:
APIA (capital) 37,000 (2014)

Sex ratio:
at birth: 1.05 male(s)/female
[see also: Sex ratio - at birth country ranks ]
0-14 years: 1.07 male(s)/female
[see also: Sex ratio - 0-14 years country ranks ]
15-24 years: 1.05 male(s)/female
[see also: Sex ratio - 15-24 years country ranks ]
25-54 years: 1.07 male(s)/female
[see also: Sex ratio - 25-54 years country ranks ]
55-64 years: 1.04 male(s)/female
[see also: Sex ratio - 55-64 years country ranks ]
65 years and over: 0.77 male(s)/female
[see also: Sex ratio - 65 years and over country ranks ]
total population: 1.04 male(s)/female (2017 est.)
[see also: Sex ratio - total population country ranks ]

Mother's mean age at first birth:
23.6 years
note: median age at first birth among women 25-29 (2009 est.)

Maternal mortality ratio:
51 deaths/100,000 live births (2015 est.)
country comparison to the world: 95
[see also: Maternal mortality ratio country ranks ]

Infant mortality rate:
total: 18.6 deaths/1,000 live births
[see also: Infant mortality rate - total country ranks ]
male: 22 deaths/1,000 live births
[see also: Infant mortality rate - male country ranks ]
female: 15.1 deaths/1,000 live births (2017 est.)
[see also: Infant mortality rate - female country ranks ]
country comparison to the world: 87

Life expectancy at birth:
total population: 74 years
[see also: Life expectancy at birth - total population country ranks ]
male: 71.1 years
[see also: Life expectancy at birth - male country ranks ]
female: 77 years (2017 est.)
[see also: Life expectancy at birth - female country ranks ]
country comparison to the world: 125
[See also: Healthy Life Expectancy ]
[See also: Health Performance ]

Total fertility rate:
2.7 children born/woman (2017 est.)
country comparison to the world: 65
[see also: Total fertility rate country ranks ]

Contraceptive prevalence rate:
26.9% (2014)
[see also: Contraceptive prevalence rate country ranks ]

Health expenditures:
7.2% of GDP (2014)
country comparison to the world: 75
[see also: Health expenditures country ranks ]

Physicians density:
0.46 physicians/1,000 population (2008)
[see also: Physicians density country ranks ]

Drinking water source:
improved: urban: 97.5% of population rural: 99.3% of population total: 99% of population
unimproved: urban: 2.5% of population rural: 0.7% of population total: 1% of population (2015 est.)

Sanitation facility access:
improved: urban: 93.3% of population rural: 91.1% of population total: 91.5% of population
unimproved: urban: 6.7% of population rural: 8.9% of population total: 8.5% of population (2015 est.)

HIV/AIDS - adult prevalence rate:
NA
[see also: HIV/AIDS - adult prevalence rate country ranks ]

HIV/AIDS - people living with HIV/AIDS:
NA
[see also: HIV/AIDS - people living with HIV/AIDS country ranks ]

HIV/AIDS - deaths:
NA
[see also: HIV/AIDS - deaths country ranks ]

Major infectious diseases:
note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus (2016)

Obesity - adult prevalence rate:
47.3% (2016)
country comparison to the world: 8
[see also: Obesity - adult prevalence rate country ranks ]

Education expenditures:
5.1% of GDP (2008)
country comparison to the world: 48

Literacy:
definition: age 15 and over can read and write
total population: 99%
[see also: Literacy - total population country ranks ]
male: 99.1%
[see also: Literacy - male country ranks ]
female: 98.8% (2015 est.)
[see also: Literacy - female country ranks ]

Unemployment, youth ages 15-24
total: 19.1%
[see also: Unemployment, youth ages 15-24 - total country ranks ]
male: 15.6%
[see also: Unemployment, youth ages 15-24 - male country ranks ]
female: 25.3% (2014 est.)
[see also: Unemployment, youth ages 15-24 - female country ranks ]
country comparison to the world: 68