Population: 48,508,972 (July 2009 est.)
Age structure: 0-14 years: 16.8% (male 4,278,581/female 3,887,516) 15-64 years: 72.3% (male 17,897,053/female 17,196,840) 65 years and over: 10.8% (male 2,104,589/female 3,144,393) (2009 est.)
Median age: total: 37.3 years male: 36 years female: 38.5 years (2009 est.)
Population growth rate: 0.266% (2009 est.)
Death rate: 5.73 deaths/1,000 population (2008 est.)
Net migration rate: -0.33 migrant(s)/1,000 population (2009 est.)
Sex ratio: at birth: 1.07 male(s)/female under 15 years: 1.1 male(s)/female 15-64 years: 1.04 male(s)/female 65 years and over: 0.67 male(s)/female total population: 1 male(s)/female (2009 est.)
Infant mortality rate: total: 4.26 deaths/1,000 live births male: 4.49 deaths/1,000 live births female: 4.02 deaths/1,000 live births (2009 est.)
Life expectancy at birth: total population: 78.72 years male: 75.45 years female: 82.22 years (2009 est.)
Total fertility rate: 1.21 children born/woman (2009 est.)
HIV/AIDS - adult prevalence rate: less than 0.1% (2007 est.)
HIV/AIDS - people living with HIV/AIDS: 13,000 (2007 est.)
HIV/AIDS - deaths: fewer than 500 (2007 est.)
Nationality: noun: Korean(s) adjective: Korean
Ethnic groups: homogeneous (except for about 20,000 Chinese)
Religions: Christian 26.3% (Protestant 19.7%, Roman Catholic 6.6%), Buddhist 23.2%, other or unknown 1.3%, none 49.3% (1995 census)
Languages: Korean, English widely taught in junior high and high school
Literacy: definition: age 15 and over can read and write total population: 97.9% male: 99.2% female: 96.6% (2002)