Before (end of 1985) (47 seats, Elections Centre)
Conservative 23 · Labour 22 · SDP-Liberal Alliance 1 · Other 1
After (end of 1986) (47 seats, Elections Centre)
Conservative 22 · Labour 21 · SDP-Liberal Alliance 3 · Other 1
Ward results
Adlington1 seat · turnout 49.2%
| E. Shone | Labour | 1,098 ✓ |
| N. Dobbie | Lib/Sdp | 540 |
| A. Marsden | Conservative | 495 |
| A. Cubbin | Green | 33 |
Anderton Heath Charnock & Rivington1 seat · turnout 38.0%
| M. Raby | Conservative | 478 |
| T. McGowan | Labour | 297 |
| P. Pilling | Lib/Sdp | 154 |
Anglezarke Heapey & Wheelton1 seat · turnout 56.0%
| Lewis-Lavender B. | Conservative | 452 |
| C. Jaynes | Labour | 163 |
| J. Dobbie | Lib/Sdp | 68 |
Chorley East1 seat · turnout 31.9%
| K. Sandham | Labour | 1,002 |
| A. Ambrose | Conservative | 282 |
Chorley North East1 seat · turnout 40.9%
| D. Edgerley | Labour | 984 ✓ |
| E. Montgomery | Conservative | 468 |
| G. Bonney | Lib/Sdp | 125 |
| S. Holgate | Green | 56 |
Chorley North West1 seat · turnout 48.9%
| M. Paterson | Conservative | 1,278 |
| C. Hubbold | Labour | 739 |
| J. Ross-Mills | Lib/Sdp | 477 |
Chorley South East1 seat · turnout 45.2%
| M. Coombes | Labour | 1,029 ✓ |
| M. Gray | Conservative | 623 |
| F. Wilson | Lib/Sdp | 195 |
| M. Holgate | Green | 64 |
Chorley South West1 seat · turnout 37.1%
| J. Wilson | Labour | 1,176 |
| D. Gray | Conservative | 293 |
| R. Logie | Green | 110 |
Chorley West1 seat · turnout 45.6%
| T. Brown | Labour | 982 |
| B. Armstrong | Conservative | 653 |
| K. Charleston | Lib/Sdp | 341 |
Clayton-Le-Woods West & Cuerden1 seat · turnout 39.5%
| S. Welch | Conservative | 730 |
| R. Riley | Labour | 601 |
| M. Crolla | Lib/Sdp | 342 |
Coppull North1 seat · turnout 52.4%
| J. Meadows | Labour | 880 |
| D. Holland | Lib/Sdp | 455 |
| R. Middleton | Conservative | 144 |
Coppull South1 seat · turnout 53.5%
| S. Norris | Lib/Sdp | 705 |
| R. Toon | Labour | 654 |
| P. Knowles | Conservative | 145 |
Eccleston & Heskin1 seat · turnout 52.4%
| A. Whittaker | Labour | 1,150 |
| T. Tasker | Conservative | 802 |
| J. Manwaring | Green | 95 |
Euxton North2 seats · turnout 48.4%
| J. Rigby | Conservative | 612 ✓ |
| A. Crompton | Conservative | 525 ✓ |
| T. Gray | Labour | 449 |
| S. Simpson | Labour | 360 |
| M. Lavender | SDP-Liberal Alliance | 148 |
| J. Logie | Green | 88 |
Mawdesley1 seat · turnout 38.2%
| F. Culshaw | Conservative | 395 |
| S. Fishman | Labour | 112 |
Whittle Le Woods1 seat · turnout 52.1%
| B. Kelly | Lib/Sdp | 581 |
| D. Burchell | Conservative | 527 |
| R. Partington | Labour | 278 |