CHEONAN-SI

1963~1989

• 1963. 01. 01
  • Cheonan-gun, Cheonan-eup and Hwanseong-myeon are integrated into Cheonan-si under Act No. 1176 (promulgated on Nov. 21, 1962), and Cheonan-gun is renamed as Cheonwon-gun (12 myeons)
• 1973. 01. 01
  • Bokdahoe-ri of Susin-myeon and Yongdu-ri of Dong-myeon are incorporated into Byeongcheon-myeon under Presidential Decree No. 6542 (promulgated on March 12, 1973)
  • Seonghwan-myeon is promoted to the eup status under Presidential Decree No. 6543 (promulgated on March 2, 1973) (1 eup, 11 myeons)
• 1975. 01. 01
  • 10 branch offices renamed as 10 dong offices under Municipal Ordinance No. 321 (promulgated on Jan. 15, 1975)
• 1983. 02. 15
  • Guryong-ri of Pungsei-myeon is incorporated into Cheonan-si under Presidential Decree No. 11027 (promulgated on Jan. 10, 1983)
• 1985. 10. 01
  • Seonggeo-myeon is promoted to the eup status under Presidential Decree No. 11772 (promulgated on Sept. 26, 1985) (2 eups, 10 myeons)
• 1985. 11. 01
  • Wonseong-dong is divided into Wonseong 1-dong and Wonseong 2-dong under Municipal Ordinance No. 931 (promulgated on Sept. 30, 1985) (11 dongs)
• 1989. 01. 01
  • Doha-ri of Ipjang-myeon is incorporated into Seonghwan-eup by Municipal Ordinance No. 1084 (promulgated on Dec. 31, 1988)

1990~1999

• 1991. 01. 01
  • Cheonwon-gun is renamed as Cheonan-gun under Act No. 4274 (promulgated on Dec. 31, 1990)
• 1994. 07. 01
  • Seongchon-dong is divided into Seongjeong 1-dong and Seongjeong 2-dong under Municipal Ordinance No. 1332 (promulgated on July 1, 1994) (12 dongs)
• 1995. 02. 20
  • Ssangbong-dong is divided into Bongmyeong-dong and Ssangyong-dong under Municipal Ordinance No. 1384 (promulgated on Feb. 20, 1995) (13 dongs)
• 1995. 05. 10
  • Cheonan-si and Cheonan-gun integrated as Cheonan-si under Act No. 4948 (promulgated on May 10, 1995) (2 eups, 10 myeons, 13 dongs)
• 1995. 08. 02
  • Bokdahoe-ri of Byeongcheon-myeon is renamed as Songjeong-ri under Municipal Ordinance No. 160 (promulgated on Aug. 22, 1995)
• 1996. 01. 01
  • Ssangyong-dong is divided into Ssangyong 1-dong and Ssangyong 2-dong under Municipal Ordinance No. 178 (promulgated on Jan. 1, 1996) (14 dongs)
• 1997. 10. 20
  • Dong names and administrative divisions are partially changed under Municipal Ordinance No. 280 (promulgated Oct. 20, 1997) (Sajik-dong, Yeongseong-dong, Daga-dong, Wonseong-dong, Guseong-dong)
• 1999. 10. 11
  • Daeryong-dong and Namsan-dong are integrated into Jungang-dong under Municipal Ordinance No. 3889 (promulgated on Oct. 11, 1999)

2000~2009

• 2002. 01. 01
  • Promotion to Jiksan-eup and Mokcheon-eup under Municipal Ordinance No. 508 (promulgated on Dec. 31, 2001) (4 eups, 8 myeons and 13 dongs)
• 2003. 08. 01
  • Ssangyong 2-dong is divided into Ssangyong 2-dong and Ssangyong 3-dong under Municipal Ordinance No. 579 (promulgated on July 1, 2003) (4 eups, 8 myeons, 14 dongs)
• 2005. 09. 30
  • Cheonan CIty Hall is relocated to Buldang-dong under Municipal Ordinance No. 692 (promulgated on Sept. 2, 2005)
• 2006. 01. 10
  • Ssangyong 3-dong is individed into Ssangyong 3-dong and Baekseok-dong under Municipal Ordinance No. 710 (promulgated on Jan. 10, 2006) (27 eups, myeons and dongs)
• 2007. 05. 28
  • Sinyong-dong is individed into Ilbong-dong and Sinbang-dong under Municipal Ordinance No. 797 (promulgated on April 23, 2007) (28 eups, myeons and dongs)
• 2008. 06. 23
  • Two general districts (Dong-gu and Seobuk-gu) are established and the city government office is opened under Municipal Ordinance No. 860 (promulgated on March 21, 2008)

2010~Present

• 2013. 10. 14
  • Baekseok-dong is divided into Baekseok-dong and Buldang-dong and Buseong-dong into Buseong 1-dong and Buseong 2-dong under Municipal Ordinance No. 1319 (Promulgated on Aug. 12, 2013) (2 gus, 4 eups, 8 myeons, 18 dongs)