<P> Religion in South Korea is characterised by the fact that an absolute majority of South Koreans ( 56.9 % as of 2015 ) have no formal membership in a religious organisation ; among those who are members of a religious organisation , there is a dominance of Protestantism , Buddhism , and Roman Catholicism . According to the national census conducted in 2015 , 19.7 % of the population belongs to Protestantism , 15.5 % to Buddhism ( Korean Buddhism ) , and 7.9 % to the Roman Catholic Church ; in total Christianity is the religion of 27.6 % of the Korean population . Buddhism was influential in ancient times and Christianity persuaded large segments of the population already in the 18th and 19th century , yet they grew rapidly in membership only by the mid-20th century , as part of the profound transformations that South Korean society has gone through in the past century , and then have shown some decline from the 2000s onwards . Native shamanic religions ( i.e. Sindo ) remain popular and could represent a large part of the unaffiliated . Indeed , according to a 2012 survey , only 15 % of the population declared to be not religious in the sense of `` atheism '' . According to the 2015 census , the proportion of the unaffiliated is higher among the youth , about 65 % among the 20 - years old . </P>
<P> Religion in South Korea is characterised by the fact that an absolute majority of South Koreans ( 56.9 % as of 2015 ) have no formal membership in a religious organisation ; among those who are members of a religious organisation , there is a dominance of Protestantism , Buddhism , and Roman Catholicism . According to the national census conducted in 2015 , 19.7 % of the population belongs to Protestantism , 15.5 % to Buddhism ( Korean Buddhism ) , and 7.9 % to the Roman Catholic Church ; in total Christianity is the religion of 27.6 % of the Korean population . Buddhism was influential in ancient times and Christianity persuaded large segments of the population already in the 18th and 19th century , yet they grew rapidly in membership only by the mid-20th century , as part of the profound transformations that South Korean society has gone through in the past century , and then have shown some decline from the 2000s onwards . Native shamanic religions ( i.e. Sindo ) remain popular and could represent a large part of the unaffiliated . Indeed , according to a 2012 survey , only 15 % of the population declared to be not religious in the sense of `` atheism '' . According to the 2015 census , the proportion of the unaffiliated is higher among the youth , about 65 % among the 20 - years old . </P>
what is the main religion in south korea
what is the main religion in south korea
Christianity
Christianity