Nationality:
noun: American(s)
adjective: American

Ethnic groups:
white 79.96%, black 12.85%, Asian 4.43%, Amerindian and Alaska native 0.97%, native Hawaiian and other Pacific islander 0.18%, two or more races 1.61% (July 2007 estimate)
note: a separate listing for Hispanic is not included because the US Census Bureau considers Hispanic to mean persons of Spanish/Hispanic/Latino origin including those of Mexican, Cuban, Puerto Rican, Dominican Republic, Spanish, and Central or South American origin living in the US who may be of any race or ethnic group (white, black, Asian, etc.); about 15.1% of the total US population is Hispanic

Languages:
English 79.2%, Spanish 12.9%, other Indo-European 3.8%, Asian and Pacific island 3.3%, other 0.9% (2011 est.)
note: data represents the language spoken at home; the US has no official national language, but English has acquired official status in 31 of the 50 states; Hawaiian is an official language in the state of Hawaii

Religions:
Protestant 51.3%, Roman Catholic 23.9%, Mormon 1.7%, other Christian 1.6%, Jewish 1.7%, Buddhist 0.7%, Muslim 0.6%, other or unspecified 2.5%, unaffiliated 12.1%, none 4% (2007 est.)

Population:
321,368,864 (July 2015 est.)
country comparison to the world: 4
[see also: Population country ranks ]

Age structure:
0-14 years: 18.99% (male 31,171,623/female 29,845,713)
[see also: Age structure 0-14 years country ranks ]
15-24 years: 13.64% (male 22,473,687/female 21,358,609)
[see also: Age structure 15-24 years country ranks ]
25-54 years: 39.76% (male 63,838,086/female 63,947,036)
[see also: Age structure 25-54 years country ranks ]
55-64 years: 12.73% (male 19,731,664/female 21,172,201)
[see also: Age structure 55-64 years country ranks ]
65 years and over: 14.88% (male 21,129,978/female 26,700,267) (2015 est.)
[see also: Age structure 65 years and over country ranks ]
population pyramid:
A population pyramid illustrates the age and sex structure of a country's population and may provide insights about political and social stability, as well as economic development. The population is distributed along the horizontal axis, with males shown on the left and females on the right. The male and female populations are broken down into 5-year age groups represented as horizontal bars along the vertical axis, with the youngest age groups at the bottom and the oldest at the top. The shape of the population pyramid gradually evolves over time based on fertility, mortality, and international migration trends.

For additional information, please see the entry for Population pyramid on the Definitions and Notes page under the References tab.

Dependency ratios:
total dependency ratio: 50.9%
[see also: Dependency ratios - total dependency ratio country ranks ]
youth dependency ratio: 28.6%
[see also: Dependency ratios - youth dependency ratio country ranks ]
elderly dependency ratio: 22.3%
[see also: Dependency ratios - elderly dependency ratio country ranks ]
potential support ratio: 4.5% (2015 est.)
[see also: Dependency ratios - potential support ratio country ranks ]

Median age:
total: 37.8 years
[see also: Median age - total country ranks ]
male: 36.5 years
[see also: Median age - male country ranks ]
female: 39.2 years (2015 est.)
[see also: Median age - female country ranks ]

Population growth rate:
0.78% (2015 est.)
country comparison to the world: 141
[see also: Population growth rate country ranks ]

Birth rate:
12.49 births/1,000 population (2015 est.)
country comparison to the world: 158
[see also: Birth rate country ranks ]

Death rate:
8.15 deaths/1,000 population (2015 est.)
country comparison to the world: 93
[see also: Death rate country ranks ]

Net migration rate:
3.86 migrant(s)/1,000 population (2015 est.)
country comparison to the world: 34
[see also: Net migration rate country ranks ]

Urbanization:
urban population: 81.6% of total population (2015)
[see also: Urbanization - urban population country ranks ]
rate of urbanization: 1.02% annual rate of change (2010-15 est.)
[see also: Urbanization - rate of urbanization country ranks ]

Major urban areas - population:
New York-Newark 18.593 million; Los Angeles-Long Beach-Santa Ana 12.31 million; Chicago 8.745 million; Miami 5.817 million; Dallas-Fort Worth 5.703 million; WASHINGTON, D.C. (capital) 4.955 million (2015)

Sex ratio:
at birth: NA
[see also: Sex ratio - at birth country ranks ]
0-14 years: 1.04 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 male(s)/female
[see also: Sex ratio - 25-54 years country ranks ]
55-64 years: 0.93 male(s)/female
[see also: Sex ratio - 55-64 years country ranks ]
65 years and over: 0.79 male(s)/female
[see also: Sex ratio - 65 years and over country ranks ]
total population: 0.97 male(s)/female (2015 est.)

Mother's mean age at first birth:
25.6 (2011 est.)
[see also: Mother's mean age at first birth country ranks ]

Maternal mortality rate:
14 deaths/100,000 live births (2015 est.)
country comparison to the world: 136
[see also: Maternal mortality rate country ranks ]

Infant mortality rate:
total: 5.87 deaths/1,000 live births
[see also: Infant mortality rate - total country ranks ]
male: 6.37 deaths/1,000 live births
[see also: Infant mortality rate - male country ranks ]
female: 5.35 deaths/1,000 live births (2015 est.)
[see also: Infant mortality rate - female country ranks ]
country comparison to the world: 167

Life expectancy at birth:
total population: 79.68 years
[see also: Life expectancy at birth - total country ranks ]
male: 77.32 years
[see also: Life expectancy at birth - male country ranks ]
female: 81.97 years (2015 est.)
[see also: Life expectancy at birth - female country ranks ]
country comparison to the world: 43

Total fertility rate:
1.87 children born/woman (2015 est.)
country comparison to the world: 142
[see also: Total fertility rate country ranks ]

Contraceptive prevalence rate:
76.4%
note: percent of women aged 15-44 (2006/10)
[see also: Contraceptive prevalence rate country ranks ]

Health expenditures:
17.1% of GDP (2013)
country comparison to the world: 1
[see also: Health expenditures country ranks ]

Physicians density:
2.45 physicians/1,000 population (2011)
[see also: Physicians density country ranks ]

Hospital bed density:
2.9 beds/1,000 population (2011)
[see also: Hospital bed density country ranks ]

Drinking water source:
improved: urban: 99.4% of population rural: 98.2% of population total: 99.2% of population
[see also: Drinking water source - Improved - total country ranks ]
unimproved: urban: 0.6% of population rural: 1.8% of population total: 0.8% of population (2015 est.)

Sanitation facility access:
improved: urban: 100% of population rural: 100% of population total: 100% of population
[see also: Sanitation facility access - Total Improved country ranks ]
unimproved: urban: 0% of population rural: 0% of population total: 0% of population (2015 est.)
[see also: Sanitation facility access - Total UnImproved country ranks ]

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 ]

Obesity - adult prevalence rate:
35% (2014)
country comparison to the world: 18
[see also: Obesity - adult prevalence rate country ranks ]

Children under the age of 5 years underweight:
0.5% (2012)
country comparison to the world: 136
[see also: Children under the age of 5 years underweight country ranks ]

Education expenditures:
5.2% of GDP (2011)
country comparison to the world: 63
[see also: Education expenditures - percent of GDP country ranks ]

School life expectancy (primary to tertiary education):
total: 16 years
[see also: School life expectancy - total country ranks ]
male: 16 years
[see also: School life expectancy - male country ranks ]
female: 17 years (2012)
[see also: School life expectancy - female country ranks ]

Unemployment, youth ages 15-24
total: 13.4%
[see also: Unemployment, youth ages 15-24 - total country ranks ]
male: 14.5%
[see also: Unemployment, youth ages 15-24 - male country ranks ]
female: 12.2% (2014 est.)
[see also: Unemployment, youth ages 15-24 - female country ranks ]
country comparison to the world: 68