http://kostat.go.kr/portal/english/index.action

It presents statistics about Korea approaching population, social trend, agriculture, life tables and causes of death by province, life expectance at birth, life expectancy at 65 years of age, gains in life expectancy after eliminating major specific causes of death, number of death and crude deaths rates by province, age-standardized death rates by cause of death, composition of causes of death by province, ranking of causes of death by age group. Also brings publications, statistical terms and news. Available in Korean too.