Barnsley Metropolitan Borough Council is the local authority for the Metropolitan Borough of Barnsley in South Yorkshire, England. One third of the council is elected each year, except for every fourth year when there is no election. Since the last boundary changes in 2004, councillors are elected from 21 wards.^[1]

Summary of the council composition after council elections, click on the year for full details of each election. Boundary changes took place for the 1979 election (increasing the number of seats by 6) and more recently the 2004 election (which decreased the number of seats by 3) prompting the whole council to be elected in those years.

Year	Labour	Conservative	Liberal / Lib Dem	Independent	Ratepayers / Residents	Independent Labour	Barnsley Independent	Reform UK
1973	57	0	0	1	0	2 (1 Dem Lab)	0	0
1975	48	1	2	1	6	2 (1 Dem Lab)	0	0
1976	39	1	5	1	11	3 (1 Dem Lab)	0	0
1978	37	1	5	1	14	2	0	0
1979	41	3	1	0	18	3	0	0
1980	46	3	1	0	13	3	0	0
1982	53	2	4	0	7	0	0	0
1983	58	3	2	0	3	0	0	0
1984	59	3	2	1	1	0	0	0
1986	62	2	0	1	1	0	0	0
1987	62	2	0	1	1	0	0	0
1988	62	2	0	1	1	0	0	0
1990	62	2	0	1	1	0	0	0
1991	62	2	0	2	0	0	0	0
1992	63	2	0	1	0	0	0	0
1994	62	2	0	2	0	0	0	0
1995	64	1	0	1	0	0	0	0
1996	63	1	0	2	0	0	0	0
1998	63	1	0	2	0	0	0	0
1999	59	2	2	3	0	0	0	0
2000	52	3	3	8	0	0	0	0
2002	49	4	3	10	0	0	0	0
2003	47	5	4	10	0	0	0	0
2004	33	5	3	22	0	0	0	0
2006	34	5	2	0	0	0	22	0
2007	33	5	2	2	0	0	21	0
2008	32	6	1	2	0	0	22	0
2010	37	6	1	1	0	0	18	0
2011	43	6	0	1	0	0	13	0
2012	52	5	0	0	0	0	6	0
2014	53	4	0	0	0	0	6	0
2015	55	4	0	0	0	0	4	0
2016	55	3	1	0	0	0	4	0
2018	49	3	4	3	1	0	3	0
2021	49	3	7	3	0	0	1	0
2022	46	4	9	3	0	0	1	0
2023	48	2	10	2	0	0	0	1
2024	48	1	11	2	0	0	0	1

• 
  1979 results map
• 
  1980 results map
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  1982 results map
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  1983 results map
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  1984 results map
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  1986 results map
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  1987 results map
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  1988 results map
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  1990 results map
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  1991 results map
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  1992 results map
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  1994 results map
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  1995 results map
• 
  1996 results map
• 
  1998 results map
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  1999 results map
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  2000 results map
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  2002 results map
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  2003 results map
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  2004 results map
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  2006 results map
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  2007 results map
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  2008 results map
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  2010 results map
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  2011 results map
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  2012 results map
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  2014 results map
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  2015 results map
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  2016 results map
• 
  2018 results map
• 
  2021 results map
• 
  2022 results map
• 
  2023 results map
• 
  2024 results map

By-election	Date	Incumbent party		Winning party
South West by-election	29 November 1979		Residents		Residents
Brierley by-election	25 September 1980		Labour		Labour
Ardsley by-election	7 May 1981		Labour		Labour
Dodworth by-election	10 December 1981		Residents		Labour
Penistone East by-election	18 February 1982		Labour		Alliance
Penistone East by-election	14 June 1984		Alliance		Labour
Park by-election	3 May 1985		Labour		Labour
Brierley by-election	10 July 1986		Labour		Labour
Ardsley by-election	25 September 1986		Labour		Labour
Cudworth by-election	30 September 1988		Labour		Labour
Athersley by-election	27 July 1989		Labour		Labour
Dodworth by-election	9 April 1992		Labour		Labour
Monk Bretton by-election	9 April 1992		Labour		Labour
Athersley by-election	24 September 1992		Labour		Labour
Brierley by-election	20 May 1993		Labour		Labour
Darton by-election	8 July 1993		Labour		Labour
Royston by-election	8 July 1993		Labour		Labour
Dearne South by-election	14 September 1995		Labour		Labour
Brierley by-election	20 March 1997		Labour		Labour
Worsbrough by-election	5 March 1998		Labour		Labour
North West by-election	18 February 1999		Labour		Labour
South West by-election			Labour		Labour
Wombwell North by-election			Labour		Liberal Democrats
Hoyland East by-election	29 July 1999		Labour		Labour
South West by-election			Labour		Independent
Dodworth by-election	7 June 2001		Labour		Labour
Athersley by-election	7 March 2002		Labour		Labour
Penistone West by-election	13 July 2006		Independent		Conservative
Worsbrough by-election	16 November 2006		Labour		Labour
St Helen's by-election	15 October 2009		Labour		Labour
St Helen's by-election	13 October 2011		Labour		Labour
Royston by-election	10 October 2013		Labour		Labour
Penistone West by-election	10 July 2014		Labour		Labour
Dearne North by-election	27 August 2015		Labour		Labour
Kingstone by-election	29 September 2017		Labour		Labour
Rockingham by-election	14 December 2017		Labour		Labour
Old Town by-election	12 July 2018		Labour		Labour

• Barnsley Metropolitan Borough Council
• By-election results Archived 29 March 2010 at the Wayback Machine