The Namyangju massacre (Korean: 남양주 민간인학살,[1][2] Hanja: 南楊州民間人虐殺[1][2] Namyangju civilian massacre[1][2]) was a mass killing conducted by South Korean police and local militia forces between October 1950 and early 1951 in Namyangju, Gyeonggi-do district of South Korea.

More than 460 people were summarily executed, including at least 23 children under the age of 10.

[4][1][2] After the victory of the Second Battle of Seoul, South Korean authorities arrested and summarily executed several individuals along with their families on suspicion of sympathizing with North Korea.

[5] During the massacre, South Korean Police conducted the Goyang Geumjeong Cave massacre in Goyang near Namyangju.

[6][7] On 22 May 2008, the Truth and Reconciliation Commission demanded that the South Korean government apologize for the massacre and support a memorial service for the victims.