Throughout this time, new neighborhoods to the southwest that were collectively known as Cheonan-gun, such as Ssangbond-dong, also grew in population, and in 1995 Cheonan-gun and Cheonan-si were merged into one large Cheonan-si.
Sepanjang waktu ini, lingkungan baru di barat daya yang secara kolektif dikenal sebagai Cheonan-gun, seperti Ssangbond-dong, juga tumbuh dalam populasi, dan pada tahun 1995 Cheonan-gun dan Cheonan-si digabung menjadi satu besar Cheonan-si.