One third of Calderdale Metropolitan Borough Council in West Yorkshire, England is elected each year, followed by one year without election.[1]
| By-election[2] | Date | Incumbent party | Winning party | | Brighouse by-election | 22 May 1974{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Lightcliffe by-election | 18 November 1977{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Hebden Bridge by-election | 24 August 1978{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Town by-election | 8 November 1979{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Skircoat by-election | 18 December 1980{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| St. John's by-election | 27 August 1982{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Luddenden Foot by-election | 18 August 1983{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|SDP–Liberal Alliance}} |
| Mixenden by-election | 26 January 1984{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Todmorden by-election | 24 May 1984{{Party name with colour|SDP–Liberal Alliance}}{{Party name with colour|SDP–Liberal Alliance}} |
| Northowram and Shelf by-election | 6 September 1984{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Calder Valley by-election | 14 February 1985{{Party name with colour|SDP–Liberal Alliance}}{{Party name with colour|SDP–Liberal Alliance}} |
| Hipperholme and Lightcliffe by-election | 23 May 1985{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Ryburn by-election | 28 November 1985{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| St. John's by-election | 3 July 1986{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Brighouse by-election | 9 October 1986{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Rastrick by-election | 24 September 1987{{Party name with colour|SDP–Liberal Alliance}}{{Party name with colour|Conservative Party (UK)}} |
| Town by-election{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Town by-election | 16 February 1989{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Calder Valley by-election | 20 April 1989{{Party name with colour|SDP–Liberal Alliance}}{{Party name with colour|Labour Party (UK)}} |
| St. John's by-election | 12 October 1989{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Town by-election | 27 September 1990{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Brighouse by-election | 8 November 1990{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Luddenden Foot by-election | 28 August 1991{{Party name with colour|Liberal Democrats (UK)}}{{Party name with colour|Liberal Democrats (UK)}} |
| Ryburn by-election | 22 November 1991{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| St. John's by-election | 19 November 1992{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Calder Valley by-election | 9 September 1993{{Party name with colour|Liberal Democrats (UK)}}{{Party name with colour|Liberal Democrats (UK)}} |
| Ryburn by-election | 3 August 1995{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Todmorden by-election | 1 May 1997{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Liberal Democrats (UK)}} |
| Todmorden by-election | 19 January 1998{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Liberal Democrats (UK)}} |
| Elland by-election | 29 October 1999{{Party name with colour|Liberal Democrats (UK)}}{{Party name with colour|Liberal Democrats (UK)}} |
| Calder Valley by-election | 5 December 2002{{Party name with colour|Liberal Democrats (UK)}}{{Party name with colour|Liberal Democrats (UK)}} |
| Mixenden by-election | 23 January 2003{{Party name with colour|Labour Party (UK)}}{{Party name with colour|British National Party}} |
| Rastrick by-election | 6 February 2003{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Mixenden by-election | 16 October 2003{{Party name with colour|Liberal Democrats (UK)}}{{Party name with colour|Liberal Democrats (UK)}} |
| Illingworth and Mixenden by-election | 22 February 2007{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
| Skircoat by-election | 2 April 2009{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Warley by-election | 19 July 2012{{Party name with colour|Liberal Democrats (UK)}}{{Party name with colour|Liberal Democrats (UK)}} |
| Hipperholme and Lightcliffe by-election | 6 April 2017{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Rastrick by-election | 8 June 2017{{Party name with colour|Conservative Party (UK)}}{{Party name with colour|Conservative Party (UK)}} |
| Todmorden by-election{{Party name with colour|Labour Party (UK)}}{{Party name with colour|Labour Party (UK)}} |
The January 2003 Mixenden by-election has become synonymous as an example of a likely Condorcet loser winning.
1. ^Calderdale Local election results. calderdale.gov.uk.
2. ^{{cite web|url=http://www.andrewteale.me.uk/misc/hullenedge-calderdale.pdf |title=Calderdale Votes: 40 years of local democracy|publisher=Local Elections Archive Project |accessdate=20 August 2017}}