Previously, the 2 entities were separated in 1986, and before that time had been united under the name Boryeong County (Boryeong-gun) since the Joseon Dynasty.
Sebelumnya, 2 entitas terpisah pada tahun 1986, dan sebelum waktu telah bersatunya di bawah nama Daerah Boryeong (Boryeong-gun) sejak Dinasti Joseon.