| 2024 | Adlington and Anderton | Labour | -70.5 pts | -9.4 pts | -61.1 pts |
| 2024 | Euxton | Labour | -54.9 pts | -9.4 pts | -45.5 pts |
| 2024 | Chorley North West | Labour | -31.2 pts | -9.4 pts | -21.8 pts |
| 2024 | Eccleston, Heskin and Charnock Richard | Labour | +12.3 pts | -9.4 pts | +21.7 pts |
| 2024 | Clayton West and Cuerden | Labour | +6.4 pts | -9.4 pts | +15.8 pts |
| 2024 | Croston, Mawdesley & Euxton South | Labour | +5.5 pts | -9.4 pts | +14.9 pts |
| 2024 | Chorley South West | Labour | +5.4 pts | -9.4 pts | +14.7 pts |
| 2024 | Euxton | Conservative | -12.9 pts | -0.8 pts | -12.1 pts |
| 2024 | Chorley North East | Conservative | +10.7 pts | -0.8 pts | +11.4 pts |
| 2024 | Chorley South East & Heath Charnock | Labour | +1.6 pts | -9.4 pts | +11.0 pts |
| 2024 | Buckshaw and Whittle | Conservative | +9.5 pts | -0.8 pts | +10.3 pts |
| 2024 | Chorley East | Labour | -19.3 pts | -9.4 pts | -9.9 pts |
| 2024 | Eccleston, Heskin and Charnock Richard | Conservative | -10.4 pts | -0.8 pts | -9.6 pts |
| 2024 | Chorley North and Astley | Labour | +0.2 pts | -9.4 pts | +9.6 pts |
| 2024 | Chorley North East | Labour | -16.6 pts | -9.4 pts | -7.2 pts |
| 2024 | Croston, Mawdesley & Euxton South | Conservative | -6.6 pts | -0.8 pts | -5.8 pts |
| 2024 | Clayton East, Brindle and Hoghton | Labour | -3.6 pts | -9.4 pts | +5.8 pts |
| 2024 | Chorley North East | Green | +4.8 pts | -0.0 pts | +4.9 pts |
| 2024 | Clayton West and Cuerden | Conservative | -5.0 pts | -0.8 pts | -4.3 pts |
| 2024 | Chorley North and Astley | Conservative | -4.9 pts | -0.8 pts | -4.1 pts |
| 2024 | Chorley South West | Green | -3.4 pts | -0.0 pts | -3.3 pts |
| 2024 | Croston, Mawdesley & Euxton South | Green | +3.1 pts | -0.0 pts | +3.2 pts |
| 2024 | Chorley North West | Conservative | -3.7 pts | -0.8 pts | -2.9 pts |
| 2024 | Buckshaw and Whittle | Labour | -11.9 pts | -9.4 pts | -2.5 pts |
| 2024 | Buckshaw and Whittle | Green | +2.3 pts | -0.0 pts | +2.4 pts |
| 2024 | Clayton East, Brindle and Hoghton | Conservative | +1.5 pts | -0.8 pts | +2.3 pts |
| 2024 | Chorley North West | Green | -1.8 pts | -0.0 pts | -1.8 pts |
| 2024 | Clayton East, Brindle and Hoghton | Liberal Democrats | +1.3 pts | -0.5 pts | +1.7 pts |
| 2024 | Croston, Mawdesley & Euxton South | Liberal Democrats | -2.1 pts | -0.5 pts | -1.7 pts |
| 2024 | Euxton | Green | +1.5 pts | -0.0 pts | +1.5 pts |
| 2024 | Eccleston, Heskin and Charnock Richard | Liberal Democrats | -1.7 pts | -0.5 pts | -1.3 pts |
| 2024 | Coppull | Conservative | +0.5 pts | -0.8 pts | +1.2 pts |
| 2024 | Chorley North and Astley | Green | -1.2 pts | -0.0 pts | -1.2 pts |
| 2024 | Clayton East, Brindle and Hoghton | Green | +0.8 pts | -0.0 pts | +0.9 pts |
| 2024 | Chorley South East & Heath Charnock | Green | +0.8 pts | -0.0 pts | +0.9 pts |
| 2024 | Adlington and Anderton | Conservative | -1.6 pts | -0.8 pts | -0.8 pts |
| 2024 | Chorley South West | Conservative | -0.0 pts | -0.8 pts | +0.7 pts |
| 2024 | Clayton West and Cuerden | Green | -0.7 pts | -0.0 pts | -0.6 pts |
| 2024 | Chorley East | Conservative | -0.2 pts | -0.8 pts | +0.6 pts |
| 2024 | Chorley South East & Heath Charnock | Conservative | -1.2 pts | -0.8 pts | -0.4 pts |
| 2024 | Eccleston, Heskin and Charnock Richard | Green | -0.2 pts | -0.0 pts | -0.2 pts |
| 2024 | Clayton West and Cuerden | Liberal Democrats | -0.6 pts | -0.5 pts | -0.2 pts |
| 2024 | Coppull | Green | -0.2 pts | -0.0 pts | -0.1 pts |
| 2024 | Adlington and Anderton | Green | +0.0 pts | -0.0 pts | +0.1 pts |
| 2023 | Croston, Mawdesley & Euxton South | Liberal Democrats | -17.7 pts | -0.4 pts | -17.3 pts |
| 2023 | Chorley North East | Labour | +12.6 pts | -0.7 pts | +13.3 pts |
| 2023 | Chorley East | Labour | +11.9 pts | -0.7 pts | +12.7 pts |
| 2023 | Chorley North East | Green | -10.3 pts | +1.9 pts | -12.2 pts |
| 2023 | Chorley North West | Green | +13.4 pts | +1.9 pts | +11.5 pts |
| 2023 | Croston, Mawdesley & Euxton South | Labour | +10.3 pts | -0.7 pts | +11.0 pts |
| 2023 | Euxton | Conservative | +5.4 pts | -4.4 pts | +9.9 pts |
| 2023 | Croston, Mawdesley & Euxton South | Conservative | +5.2 pts | -4.4 pts | +9.6 pts |
| 2023 | Adlington and Anderton | Labour | +8.6 pts | -0.7 pts | +9.3 pts |
| 2023 | Chorley North West | Conservative | -11.2 pts | -4.4 pts | -6.7 pts |
| 2023 | Euxton | Labour | -7.1 pts | -0.7 pts | -6.4 pts |
| 2023 | Buckshaw and Whittle | Labour | +5.4 pts | -0.7 pts | +6.1 pts |
| 2023 | Clayton East, Brindle and Hoghton | Conservative | -10.6 pts | -4.4 pts | -6.1 pts |
| 2023 | Clayton East, Brindle and Hoghton | Labour | +5.2 pts | -0.7 pts | +5.9 pts |
| 2023 | Adlington and Anderton | Conservative | -9.9 pts | -4.4 pts | -5.4 pts |
| 2023 | Chorley North and Astley | Conservative | -0.8 pts | -4.4 pts | +3.7 pts |
| 2023 | Chorley South East & Heath Charnock | Labour | +2.8 pts | -0.7 pts | +3.6 pts |
| 2023 | Chorley East | Conservative | -1.2 pts | -4.4 pts | +3.2 pts |
| 2023 | Clayton West and Cuerden | Green | -1.2 pts | +1.9 pts | -3.1 pts |
| 2023 | Clayton East, Brindle and Hoghton | Green | -1.0 pts | +1.9 pts | -2.9 pts |
| 2023 | Clayton West and Cuerden | Conservative | -1.6 pts | -4.4 pts | +2.9 pts |
| 2023 | Chorley South West | Green | +4.7 pts | +1.9 pts | +2.8 pts |
| 2023 | Eccleston, Heskin and Charnock Richard | Liberal Democrats | +2.2 pts | -0.4 pts | +2.5 pts |
| 2023 | Chorley South East & Heath Charnock | Green | -0.6 pts | +1.9 pts | -2.5 pts |
| 2023 | Eccleston, Heskin and Charnock Richard | Conservative | -2.1 pts | -4.4 pts | +2.4 pts |
| 2023 | Chorley South West | Conservative | -6.6 pts | -4.4 pts | -2.2 pts |
| 2023 | Buckshaw and Whittle | Green | -0.2 pts | +1.9 pts | -2.1 pts |
| 2023 | Chorley North East | Conservative | -2.3 pts | -4.4 pts | +2.1 pts |
| 2023 | Chorley North West | Labour | -2.8 pts | -0.7 pts | -2.0 pts |
| 2023 | Clayton West and Cuerden | Labour | -2.2 pts | -0.7 pts | -1.4 pts |
| 2023 | Eccleston, Heskin and Charnock Richard | Green | +0.6 pts | +1.9 pts | -1.3 pts |
| 2023 | Chorley North and Astley | Green | +0.6 pts | +1.9 pts | -1.3 pts |
| 2023 | Chorley South East & Heath Charnock | Conservative | -3.3 pts | -4.4 pts | +1.1 pts |
| 2023 | Chorley North and Astley | Labour | +0.1 pts | -0.7 pts | +0.9 pts |
| 2023 | Buckshaw and Whittle | Conservative | -5.2 pts | -4.4 pts | -0.7 pts |
| 2023 | Chorley South West | Labour | -0.1 pts | -0.7 pts | +0.7 pts |
| 2023 | Coppull | Green | +2.6 pts | +1.9 pts | +0.7 pts |
| 2023 | Adlington and Anderton | Green | +1.3 pts | +1.9 pts | -0.6 pts |
| 2023 | Coppull | Conservative | -3.9 pts | -4.4 pts | +0.5 pts |
| 2023 | Croston, Mawdesley & Euxton South | Green | +2.2 pts | +1.9 pts | +0.3 pts |
| 2023 | Euxton | Green | +1.7 pts | +1.9 pts | -0.3 pts |
| 2023 | Eccleston, Heskin and Charnock Richard | Labour | -0.7 pts | -0.7 pts | +0.1 pts |
| 2022 | Croston, Mawdesley & Euxton South | Liberal Democrats | +18.8 pts | +0.1 pts | +18.6 pts |
| 2022 | Clayton East, Brindle and Hoghton | Conservative | +4.2 pts | -6.7 pts | +11.0 pts |
| 2022 | Croston, Mawdesley & Euxton South | Labour | -4.9 pts | +5.9 pts | -10.8 pts |
| 2022 | Buckshaw and Whittle | Labour | +16.4 pts | +5.9 pts | +10.6 pts |
| 2022 | Chorley South West | Labour | -4.6 pts | +5.9 pts | -10.5 pts |
| 2022 | Clayton West and Cuerden | Labour | +15.4 pts | +5.9 pts | +9.5 pts |
| 2022 | Chorley South West | Green | +11.1 pts | +2.2 pts | +8.9 pts |
| 2022 | Clayton East, Brindle and Hoghton | Labour | +14.4 pts | +5.9 pts | +8.5 pts |
| 2022 | Euxton | Labour | +14.2 pts | +5.9 pts | +8.3 pts |
| 2022 | Euxton | Conservative | -14.9 pts | -6.7 pts | -8.2 pts |
| 2022 | Chorley North West | Conservative | +0.4 pts | -6.7 pts | +7.1 pts |
| 2022 | Croston, Mawdesley & Euxton South | Conservative | -12.7 pts | -6.7 pts | -6.0 pts |
| 2022 | Chorley North West | Green | -2.9 pts | +2.2 pts | -5.1 pts |
| 2022 | Clayton West and Cuerden | Conservative | -11.7 pts | -6.7 pts | -4.9 pts |
| 2022 | Chorley East | Labour | +1.3 pts | +5.9 pts | -4.6 pts |
| 2022 | Chorley North East | Labour | +1.5 pts | +5.9 pts | -4.3 pts |
| 2022 | Chorley South East & Heath Charnock | Green | -1.9 pts | +2.2 pts | -4.1 pts |
| 2022 | Adlington and Anderton | Conservative | -2.8 pts | -6.7 pts | +3.9 pts |
| 2022 | Chorley East | Green | +5.7 pts | +2.2 pts | +3.5 pts |
| 2022 | Buckshaw and Whittle | Conservative | -10.1 pts | -6.7 pts | -3.4 pts |
| 2022 | Croston, Mawdesley & Euxton South | Green | -1.2 pts | +2.2 pts | -3.4 pts |
| 2022 | Chorley North West | Labour | +2.6 pts | +5.9 pts | -3.3 pts |
| 2022 | Chorley North and Astley | Green | +5.0 pts | +2.2 pts | +2.8 pts |
| 2022 | Chorley North East | Green | +4.8 pts | +2.2 pts | +2.6 pts |
| 2022 | Adlington and Anderton | Labour | +3.3 pts | +5.9 pts | -2.5 pts |
| 2022 | Eccleston, Heskin and Charnock Richard | Conservative | -4.6 pts | -6.7 pts | +2.1 pts |
| 2022 | Chorley North and Astley | Labour | +7.9 pts | +5.9 pts | +2.1 pts |
| 2022 | Eccleston, Heskin and Charnock Richard | Green | +0.3 pts | +2.2 pts | -1.8 pts |
| 2022 | Chorley South East & Heath Charnock | TUSC | +1.9 pts | +0.1 pts | +1.7 pts |
| 2022 | Buckshaw and Whittle | Green | +3.9 pts | +2.2 pts | +1.7 pts |
| 2022 | Chorley South East & Heath Charnock | Conservative | -5.2 pts | -6.7 pts | +1.5 pts |
| 2022 | Clayton West and Cuerden | Green | +0.8 pts | +2.2 pts | -1.4 pts |
| 2022 | Coppull | Labour | +4.7 pts | +5.9 pts | -1.2 pts |
| 2022 | Eccleston, Heskin and Charnock Richard | Labour | +4.8 pts | +5.9 pts | -1.1 pts |
| 2022 | Chorley South East & Heath Charnock | Labour | +5.2 pts | +5.9 pts | -0.7 pts |
| 2022 | Eccleston, Heskin and Charnock Richard | Liberal Democrats | -0.5 pts | +0.1 pts | -0.6 pts |
| 2022 | Euxton | Green | +2.7 pts | +2.2 pts | +0.5 pts |
| 2022 | Coppull | Conservative | -7.2 pts | -6.7 pts | -0.5 pts |
| 2022 | Chorley North East | Conservative | -6.3 pts | -6.7 pts | +0.4 pts |
| 2022 | Coppull | Green | +2.5 pts | +2.2 pts | +0.3 pts |
| 2022 | Chorley East | Conservative | -7.0 pts | -6.7 pts | -0.3 pts |
| 2022 | Chorley South West | Conservative | -6.5 pts | -6.7 pts | +0.2 pts |
| 2022 | Adlington and Anderton | Green | +2.0 pts | +2.2 pts | -0.2 pts |
| 2022 | Chorley North and Astley | Conservative | -6.7 pts | -6.7 pts | +0.1 pts |
| 2022 | Clayton East, Brindle and Hoghton | Green | +2.2 pts | +2.2 pts | 0.0 pts |
| 2019 | Chorley North West | Labour | +23.5 pts | -5.5 pts | +29.1 pts |
| 2019 | Clayton-le-Woods and Whittle-le-Woods | Labour | +20.0 pts | -5.5 pts | +25.5 pts |
| 2019 | Chorley North West | Conservative | +20.6 pts | -3.8 pts | +24.4 pts |
| 2019 | Clayton-le-Woods and Whittle-le-Woods | Conservative | -26.0 pts | -3.8 pts | -22.1 pts |
| 2019 | Chorley East | Labour | +4.5 pts | -5.5 pts | +10.0 pts |
| 2019 | Coppull | Conservative | +4.2 pts | -3.8 pts | +8.0 pts |
| 2019 | Chorley North East | Conservative | +3.9 pts | -3.8 pts | +7.8 pts |
| 2019 | Eccleston and Mawdesley | UK Independence Party (UKIP) | +10.2 pts | +2.7 pts | +7.4 pts |
| 2019 | Euxton South | Conservative | +3.2 pts | -3.8 pts | +7.0 pts |
| 2019 | Chorley North East | Labour | +1.3 pts | -5.5 pts | +6.9 pts |
| 2019 | Chorley South West | Labour | -11.9 pts | -5.5 pts | -6.4 pts |
| 2019 | Astley and Buckshaw | Conservative | -10.0 pts | -3.8 pts | -6.2 pts |
| 2019 | Chisnall | Conservative | -9.5 pts | -3.8 pts | -5.7 pts |
| 2019 | Clayton-le-Woods and Whittle-le-Woods | Liberal Democrats | +7.4 pts | +1.7 pts | +5.7 pts |
| 2019 | Adlington and Anderton | Liberal Democrats | +6.9 pts | +1.7 pts | +5.2 pts |
| 2019 | Clayton-le-Woods North | Conservative | -8.7 pts | -3.8 pts | -4.9 pts |
| 2019 | Eccleston and Mawdesley | Conservative | +0.3 pts | -3.8 pts | +4.2 pts |
| 2019 | Chorley South East | Conservative | +0.2 pts | -3.8 pts | +4.0 pts |
| 2019 | Eccleston and Mawdesley | Labour | -1.8 pts | -5.5 pts | +3.7 pts |
| 2019 | Clayton-le-Woods North | Labour | -8.9 pts | -5.5 pts | -3.4 pts |
| 2019 | Chorley South East | Labour | -8.5 pts | -5.5 pts | -3.0 pts |
| 2019 | Euxton South | Labour | -3.2 pts | -5.5 pts | +2.3 pts |
| 2019 | Clayton-le-Woods West and Cuerden | Labour | -3.2 pts | -5.5 pts | +2.3 pts |
| 2019 | Adlington and Anderton | Conservative | -1.9 pts | -3.8 pts | +1.9 pts |
| 2019 | Chorley South West | Liberal Democrats | +3.2 pts | +1.7 pts | +1.5 pts |
| 2019 | Clayton-le-Woods West and Cuerden | Conservative | -5.1 pts | -3.8 pts | -1.3 pts |
| 2019 | Coppull | Labour | -4.2 pts | -5.5 pts | +1.3 pts |
| 2019 | Chorley South West | Conservative | -3.1 pts | -3.8 pts | +0.7 pts |
| 2019 | Chorley East | Conservative | -4.5 pts | -3.8 pts | -0.6 pts |
| 2019 | Adlington and Anderton | Labour | -5.0 pts | -5.5 pts | +0.5 pts |
| 2015 | Chorley North West | Labour | +31.4 pts | -0.7 pts | +32.1 pts |
| 2015 | Clayton-le-Woods and Whittle-le-Woods | Conservative | -15.9 pts | +6.8 pts | -22.7 pts |
| 2015 | Chorley North West | Conservative | +27.2 pts | +6.8 pts | +20.4 pts |
| 2015 | Chisnall | Labour | -18.6 pts | -0.7 pts | -17.8 pts |
| 2015 | Chorley North East | Labour | -16.0 pts | -0.7 pts | -15.2 pts |
| 2015 | Chorley South West | Labour | -15.6 pts | -0.7 pts | -14.9 pts |
| 2015 | Chorley North East | Conservative | -6.1 pts | +6.8 pts | -12.9 pts |
| 2015 | Chisnall | Conservative | +18.6 pts | +6.8 pts | +11.7 pts |
| 2015 | Chorley South West | Conservative | -2.4 pts | +6.8 pts | -9.2 pts |
| 2015 | Coppull | Conservative | +15.5 pts | +6.8 pts | +8.7 pts |
| 2015 | Eccleston and Mawdesley | UK Independence Party (UKIP) | -7.2 pts | +0.5 pts | -7.7 pts |
| 2015 | Chorley East | UK Independence Party (UKIP) | -7.1 pts | +0.5 pts | -7.6 pts |
| 2015 | Coppull | Labour | +6.8 pts | -0.7 pts | +7.5 pts |
| 2015 | Astley and Buckshaw | Labour | -8.1 pts | -0.7 pts | -7.4 pts |
| 2015 | Clayton-le-Woods North | Labour | +6.1 pts | -0.7 pts | +6.8 pts |
| 2015 | Clayton-le-Woods West and Cuerden | Conservative | +0.6 pts | +6.8 pts | -6.2 pts |
| 2015 | Adlington and Anderton | UK Independence Party (UKIP) | -5.7 pts | +0.5 pts | -6.1 pts |
| 2015 | Euxton South | UK Independence Party (UKIP) | -5.4 pts | +0.5 pts | -5.9 pts |
| 2015 | Astley and Buckshaw | Conservative | +12.5 pts | +6.8 pts | +5.6 pts |
| 2015 | Clayton-le-Woods and Whittle-le-Woods | Labour | +4.2 pts | -0.7 pts | +5.0 pts |
| 2015 | Astley and Buckshaw | UK Independence Party (UKIP) | -4.4 pts | +0.5 pts | -4.8 pts |
| 2015 | Clayton-le-Woods North | Conservative | +11.3 pts | +6.8 pts | +4.5 pts |
| 2015 | Chorley South East | UK Independence Party (UKIP) | -4.0 pts | +0.5 pts | -4.5 pts |
| 2015 | Clayton-le-Woods North | Green | +4.4 pts | +0.6 pts | +3.7 pts |
| 2015 | Chorley East | Green | +3.6 pts | +0.6 pts | +3.0 pts |
| 2015 | Euxton South | Conservative | +4.0 pts | +6.8 pts | -2.8 pts |
| 2015 | Eccleston and Mawdesley | Labour | +2.0 pts | -0.7 pts | +2.7 pts |
| 2015 | Clayton-le-Woods North | Liberal Democrats | +3.1 pts | +0.6 pts | +2.5 pts |
| 2015 | Chorley East | Labour | +1.5 pts | -0.7 pts | +2.2 pts |
| 2015 | Euxton South | Labour | +1.4 pts | -0.7 pts | +2.2 pts |
| 2015 | Adlington and Anderton | Liberal Democrats | +2.7 pts | +0.6 pts | +2.1 pts |
| 2015 | Adlington and Anderton | Conservative | +4.8 pts | +6.8 pts | -2.0 pts |
| 2015 | Clayton-le-Woods and Whittle-le-Woods | Liberal Democrats | -1.3 pts | +0.6 pts | -2.0 pts |
| 2015 | Coppull | UK Independence Party (UKIP) | +2.2 pts | +0.5 pts | +1.8 pts |
| 2015 | Eccleston and Mawdesley | Conservative | +5.3 pts | +6.8 pts | -1.5 pts |
| 2015 | Chorley South East | Conservative | +5.4 pts | +6.8 pts | -1.4 pts |
| 2015 | Chorley South East | Labour | +0.6 pts | -0.7 pts | +1.4 pts |
| 2015 | Adlington and Anderton | Labour | -1.8 pts | -0.7 pts | -1.1 pts |
| 2015 | Chorley East | Conservative | +7.5 pts | +6.8 pts | +0.7 pts |
| 2015 | Chorley South East | Liberal Democrats | +1.3 pts | +0.6 pts | +0.7 pts |
| 2015 | Clayton-le-Woods West and Cuerden | Labour | -0.6 pts | -0.7 pts | +0.1 pts |