1998
August
County Ordinance No. 2418 restored Duhyeon-ri and Tonggu-ri in Baekhak-myeon, Yeoncheon-gun as administrative ri
1989
January
Presidential Decree No. 12557 incorporated Bugok-ri, Gwanin-myeon, Pocheon-gun into Yeoncheon-eup
April
According to the County Ordinance No. 2026, the status of Wondang Office in Bankhak-myeon was elevated to Jangnam-myeon to organize it into the current 2 Eup and 8 Myeon
1987
January
Presidential Decree No. 12007 incorporated Seokjang-ri, Misan-myeon into Baekhak-myeon
1985
May
County Ordinance No. 1001 divided Chatan 2-ri, Yeoncheon-eup, Yeoncheon-gun into Chatan 2-ri and Chatan 4-ri; Samgeo-ri, Gunnam-myeon into Semgeo 1-ri and Samgeo 2-ri; Okgye 1-ri into Okgye 1-ri and Okgye 3-ri; and Namgye-ri into Namgye 1-ri and Namgye 2-ri.
September
County Ordinance No. 1019 restored Hoengsan-ri, Jung-myeon, Yeoncheon-gun as an administrative ri
October
Presidential Decree No. 11772 raised the status of Jeongok-myeon to eup
1983
February
Presidential Decree No. 11027 incorporated all of Gwanin-myeon into Pocheon-gun and Choseong-ri, Daejeon-ri, Jangtan-ri, Gungpyeong-ri, and Baegui-ri in Cheongsan-myeon, Pocheon-gun into Yeoncheon-gun.
1979
May
Presidential Decree No. 9409 raised the status of Yeoncheon-myeon to eup
1965
April
County Ordinance No. 111 established Wondang Office in Baekhak-myeon
1963
January
Act No. 1178 incorporated Neolmok-ri, Jeokseong-myeon, Paju-gun into Jeongok-myeon; Samhwa-ri into Misan-myeon; and Sinseo-myeon, Cheolwo-gun, Gangwon-do Province into Yeoncheon-gun.
1954
October
Restored administrative power as of November 17 of the same year under the Act on Temporary Administration of the Re-Taken Areas as Act No. 350
1945
November
Military Ordinance No. 22 incorporated part of Jeokseong-myeon, all of Nam-myeon, Baekhak-myeon, and Jeongok-myeon into Paju-gun
1914
March
Two townships of Majeon and Jeokseong, most of Sakyeong-gun, Yeonggeun-myeon, and Yangju-gun were incorporated into Yeoncheon-gun
1906
11th year of Gojong the
Incorporated Gwanin-myeon, Cheorwon-gun into Yeoncheon-gun
1413
13th year of King Taejong of Joseon
Installed Yeoncheon-gun Office
1309
1st year of King Chungseon of Goryeo
Renamed the county from Jangju to Yeoncheon
1069
23rd year of King Munjong
Seungryeong, Sakryeong, Majeon, and Jeokseong were incorporated into Jangju to belong to Gaesongbu to be included in Gyeonggi.
1018
9th year of King Hyeonjong of Goryeo
Jangdan-hyeon (currently Jangnam-myeon) became the hub of the first Gyeonggi system along with Gaesong-hyeon due to a large-scale reorganization of the regional administrative system. Jangju (currently Yeoncheon) became part of Dongju-gun (currently Cheorwon).
940
23rd year of King Taejo of Goryeo
Renamed the county Jangju
757
16th year of King Gyeongdeok of Silla
The county was named Gongseong-hyeon.
675
15th year of King Munmu of Silla
After Silla defeated the troops of Tang Dynasty in Maechoseong Fortress (or Maesoseong Fortress; currently Daejeon-ri Mountain Fortress) along the Hantangang River, Yeoncheon was completely incorporated into the territory of Silla. With their victory at the Battle of Maechoseong Fortress, Silla occupied the southern part of the Taedonggang River and established the first unified dynasty on the Korean Peninsula.
553
14th year of King Jinheung of Silla
As Silla, which occupied the area around the Hangang River, expanded its territory to the north, the southern part of the Imjingang River was incorporated into Silla. The Imjingang River became a border between Goguryeo in the north and Silla in the south until the fall of Goguryeo in 668.
396
King Gwanggaeto the Great of Goguryeo
As Goguryeo fully began its southward advance under the reigns of King Gwanggaeto the Great and King Jangsu, the area was absorbed into Goguryeo. Goguryeo established Gongmok Dalhyeon, an administrative district, in the Yeoncheon area and effectively controlled it.
BC18
King Onjo of Baekje
When King Onjo of Baekje founded Baekje in the area near the Hangang River, he expanded his influence towards the north, absorbing the area into Baekje.
300,000years ago
Paleolithic Age
Homo erectus, the first humans on the Korean Peninsula, began to reside along the Hantangang River in Yeoncheon. The axes they left behind were first discovered in 1978 in Jeongok-ri, Yeoncheon, for the first time in East Asia. They became crucial evidence for overturning the Mobius theory.