1st term ~ Revision of the election law for local Council members
- Apr 25, 1952 The 1st member election
170 elected from 14 eups and myeons
- Aug 5, 1956 The 2nd member election
160 elected from 14 eups and myeons
- Dec 19, 1960 The 3rd member election
161 elected from 14 eups and myeons
- May 16, 1961 Suspended due to the Military Revolution.
- Dec 31, 1990 Revision of the Local Council Member Election Act
The 1st Council
- Mar 26, 1991 The 1st member election
13 elected from 11 constituencies in Cheonan City, 13 elected from 12 constituencies in Cheonan-gun
- Apr 15, 1991 Opened the 1st Cheonan City/Gun Council.
- May 10, 1995 Opened the Integrated Cheonan City Council
26 people from 23 constituencies in eups/myeons/dongs
The 2nd Council
- Jun 27, 1995 The 2nd Cheonan City Council Election
30 elected from 25 constituencies
- Jun 1, 1995 Started the 2nd Cheonan City Council member's term (opened on Jul 10, 1995)
- Apr 30, 1998 Revision of the Public Official Election and Election Fraud Prevention Act
The number of members was adjusted from 30 to 25.
The 3rd Council
- Jun 4, 1998 The 3rd Cheonan City Council Election
25 elected from 25 constituencies
- Jul 1 1998 Started the 3rd Cheonan City Council member's term (opened on Jul 8, 1998)
The 4th Council
- Jun 13, 2002 The 4th Cheonan City Council Election
25 elected from 5 constituencies
- Jul 1, 2002 Started the 4th Cheonan City Council member's term (opened on Jul 4, 2002)
- Aug 4, 2005 Revision of the Public Official Election Act
The number of members was adjusted from 26 to 21.
The 5th Council
- May 31, 2006 The 5th Cheonan City Council Election
21 elected from 7 constituencies (18 constituencies, 3 proportional representatives)
- Jul 1, 2006 Started the 5th Cheonan City Council member's term (opened on Jul 5, 2006)
The 6th Council
- Jun 2, 2010 The 6th Cheonan City Council Election
21 elected from 7 constituencies (18 constituencies, 3 proportional representatives)
- Jul 1, 2010 Started the 6th Cheonan City Council member's term (opened on Jul 7, 2010)
- Feb 13, 2014 Revision of the Public Official Election Act
The number of members was adjusted from 21 to 22.
The 7th Council
- Jun 4, 2014 The 7th Cheonan City Council Election
22 elected from 8 constituencies (19 constituencies, 3 proportional representatives)
- Jul 1, 2014 Started the 7th Cheonan City Council member's term
- May 27, 2018 Revision of the Public Official Election Act
2 constituencies added, the number of members was adjusted from 22 to 25.
The 8th Council
- Jun 13, 2018 The 8th Cheonan City Council Election
25 elected from 10 constituencies (22 constituencies, 3 proportional representatives)
- Jul 1, 2018 Started the 8th Cheonan City Council member's term (opened on Jul 4, 2010)
The 9th Council
- Apr 20, 2022 Revision of the Public Official Election Act
1 constituencies added, the number of members was adjusted from 25 to 27.
- Jul 4, 2022 Started the 9th Cheonan City Council member's term (opened on Jul 4, 2022)