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 82.1%, Spanish 10.7%, other Indo-European 3.8%, Asian and Pacific island 2.7%, other 0.7% (2000 census)
note: the US has no official national language, but English has acquired official status in 28 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:
316,438,601 (July 2013 est.)
country comparison to the world: 4
[see also: Population country ranks ]

Age structure:
0-14 years: 20% (male 32,344,207/female 31,006,688)
[see also: Age structure 0-14 years country ranks ]
15-24 years: 13.7% (male 22,082,128/female 21,157,025)
25-54 years: 40.2% (male 63,802,736/female 63,581,749)
55-64 years: 12.3% (male 18,699,338/female 20,097,791)
65 years and over: 13.9% (male 19,122,853/female 24,774,052) (2013 est.)

Dependency ratios:
total dependency ratio: 50.4 %
[see also: Dependency ratios - total dependency ratio country ranks ]
youth dependency ratio: 29.4 %
elderly dependency ratio: 21 %
potential support ratio: 4.8 (2013)

Median age:
total: 37.2 years
[see also: Median age - total country ranks ]
male: 35.9 years
female: 38.5 years (2013 est.)

Population growth rate:
0.9% (2013 est.)
country comparison to the world: 124
[see also: Population growth rate country ranks ]

Birth rate:
13.66 births/1,000 population (2013 est.)
country comparison to the world: 147
[see also: Birth rate country ranks ]

Death rate:
8.39 deaths/1,000 population (2013 est.)
country comparison to the world: 89
[see also: Death rate country ranks ]

Net migration rate:
3.64 migrant(s)/1,000 population (2013 est.)
country comparison to the world: 29
[see also: Net migration rate country ranks ]

Urbanization:
urban population: 82% of total population (2010)
[see also: Urbanization - urban population country ranks ]
rate of urbanization: 1.2% annual rate of change (2010-15 est.)

Major urban areas - population:
New York-Newark 19.3 million; Los Angeles-Long Beach-Santa Ana 12.675 million; Chicago 9.134 million; Miami 5.699 million; WASHINGTON, D.C. (capital) 4.421 million (2009)

Sex ratio:
at birth: 1.05 male(s)/female
[see also: Sex ratio - at birth country ranks ]
0-14 years: 1.04 male(s)/female
15-24 years: 1.04 male(s)/female
25-54 years: 1 male(s)/female
55-64 years: 0.93 male(s)/female
65 years and over: 0.77 male(s)/female
total population: 0.97 male(s)/female (2013 est.)

Mother's mean age at first birth:
25 (2006 est.)
[see also: Mother's mean age at first birth country ranks ]

Maternal mortality rate:
21 deaths/100,000 live births (2010)
country comparison to the world: 137
[see also: Maternal mortality rate country ranks ]

Infant mortality rate:
total: 5.9 deaths/1,000 live births
country comparison to the world: 174
male: 6.55 deaths/1,000 live births
female: 5.22 deaths/1,000 live births (2013 est.)

Life expectancy at birth:
total population: 78.62 years
country comparison to the world: 51
male: 76.19 years
female: 81.17 years (2013 est.)

Total fertility rate:
2.06 children born/woman (2013 est.)
country comparison to the world: 121
[see also: Total fertility rate country ranks ]

Contraceptive prevalence rate:
76.4%
note: percent of women aged 15-44 (2010)
[see also: Contraceptive prevalence rate country ranks ]

Health expenditures:
17.9% of GDP (2011)
country comparison to the world: 3
[see also: Health expenditures country ranks ]

Physicians density:
2.42 physicians/1,000 population (2009)
[see also: Physicians density country ranks ]

Hospital bed density:
3 beds/1,000 population (2010)
[see also: Hospital bed density country ranks ]

Drinking water source:
improved: