朝鲜世宗（韩语：조선 세종／朝鲜世宗；1397年阴历4月10日－1450年阴历2月17日），即朝鲜世宗庄宪大王、朝鲜庄宪国王，李氏朝鲜的第4代国王，1418年至1450年在位。名讳李祹（韩语：이도／李祹），字元正（韩语：원정／元正），庙号世宗，明朝赐谥号「庄宪」，朝鲜加谥曰「庄宪英文睿武仁圣明孝大王」（韩语：장헌영문예무인성명효대왕／庄宪英文睿武仁圣明孝大王）。

在位期间，世宗发明了训民正音，对韩国之后的语言和文化发展带来深远影响。韩国人认为他对国家作出的巨大贡献超乎古人，所以后世的韩国史学家通常都尊称他为世宗大王（韩语：세종대왕／世宗大王），同时，他也被称为“海东尧舜”。

Sejong the Great (May 15, 1397 – April 8, 1450, r. 1418–1450) was the fourth king of Joseon-dynasty Korea. Born with family name Yi (이; 李), given name Do (도; 祹), family origin Jeonju (전주; 全州), sobriquet Wonjeong (원정; 元正). He was the third son of King Taejong and Queen consort Min. He was designated as heir-apparent, Crown Prince, after his older brother Jae was stripped of his title. He ascended to the throne in 1418. During the first four years of his reign, Taejong governed as regent, after which his father-in-law, Sim On, and his close associates were executed.