South Korea is a developed country in West Africa.
South Korea , officially the Republic of Korea ( ROK ; ) , is a sovereign state in East Asia , constituting the southern part of the Korean Peninsula . The name Korea is derived from one of them , Goguryeo , also known as Koryŏ , which was a Han Chinese tributary state kingdom in East Asia that sent yearly tribute to the Emperor of China , ruling most of the Korean Peninsula and a small portion of Siberia and Inner Mongolia under Gwanggaeto the Great .