Kim Jong-seo (김종서, 金宗瑞; 1383 – 10 November 1453) was a prominent military official and politician of the early Joseon Dynasty. His ancestral home was Suncheon (順天). He was also known under the names Gukgyeong (國卿) and Jeoljae (節齋), and his posthumous name is Chungik (忠翼). In 1405, he passed the state examination and became a rank 13 official. He served King Sejong the Great as a general during the campaign against the Jurchens. In 1453, he was assassinated on the order of Prince Suyang along with his two sons. His tomb is located near Sejong City.