Before (end of 1986) (44 seats, Elections Centre)
Other 20 · Conservative 17 · Labour 4 · SDP-Liberal Alliance 3
After (end of 1987) (44 seats, Elections Centre)
SDP-Liberal Alliance 19 · Other 16 · Conservative 5 · Labour 4
Ward results
Breage & Germoe2 seats
| R. Parker | Independent | 846 |
| T. Jones | Independent | 395 |
| J. Walker | Conservative | 343 |
| W. Smith | Independent | 256 |
| G. Shaw | Independent | 162 |
Camborne North3 seats · turnout 25.6%
| R. Godolphin | Lib/Sdp | 1,006 |
| B. Waters | Conservative | 953 |
| L. Ibbotson | Lib/Sdp | 725 |
| W. Kemp | Labour | 620 |
| M. Jeffery | Labour | 569 |
Camborne South3 seats · turnout 34.0%
| B. Godolphin | Lib/Sdp | 815 |
| G. Lawson | Labour | 762 |
| R. Davies | Lib/Sdp | 735 |
| M. Pascoe | Conservative | 719 |
| R. Spencer | Lib/Sdp | 703 |
| J. Parsons | Labour | 629 |
| P. Nugent | Labour | 604 |
Camborne West3 seats · turnout 35.2%
| A. Heffer | Lib/Sdp | 1,004 |
| T. Ham | Lib/Sdp | 828 |
| P. Moon | Lib/Sdp | 787 |
| K Bowden | Conservative | 782 |
| B. Morrison | Labour | 586 |
| R. Thomas | Conservative | 566 |
| A. Wilcox | Conservative | 476 |
Constantine & Gweek1 seat
| A. Badger | Conservative | 0 ✓ |
Crowan1 seat · turnout 42.1%
| T. Hart | Independent | 534 |
| L. Warrener | Lib/Sdp | 160 |
| L. Wilkes | Independent | 0 ✓ |
Helston North2 seats · turnout 24.7%
| D Eddy | Conservative | 662 |
| R. Bryant | Independent | 473 |
| A.S. Kibblewhite | Lib/Sdp | 460 |
Helston South2 seats · turnout 32.0%
| R. Curnow | Independent | 534 |
| P. Clark | Labour | 301 |
| A. George | Independent | 285 |
| C. Minchin | Conservative | 252 |
| J. Keay | Independent | 245 |
| W. Thomas | Labour | 211 |
Illogan North3 seats · turnout 32.4%
| G. Ford | Lib/Sdp | 868 |
| J. Biggs | Lib/Sdp | 859 |
| M. Powell | Lib/Sdp | 850 |
| J. Keverne | Conservative | 812 |
| J. Mayne | Independent | 732 |
| D. Brewer | Conservative | 723 |
Illogan South3 seats · turnout 31.2%
| H. Eva | Lib/Sdp | 1,008 |
| M. Moyle | Lib/Sdp | 953 |
| B. Eva | Lib/Sdp | 944 |
| F. Nicholls | Conservative | 572 |
| K. Bennie | Conservative | 570 |
| V. Lacey | Conservative | 550 |
Mabe & St. Gluvias1 seat · turnout 46.9%
| E. Spargo | Conservative | 490 |
| J. Chellew | Lib/Sdp | 359 |
Mawnan & Budock1 seat · turnout 54.9%
| M. Muirhead | Independent | 916 |
| W. Rickard | Independent | 360 |
Porthleven2 seats · turnout 31.2%
| G. Andrews | Independent | 883 |
| R. Bradbury | Lib/Sdp | 462 |
| P. Prior | MK | 279 |
Redruth North3 seats · turnout 29.5%
| P. Neville | Labour | 609 |
| J. Ham | Independent | 601 |
| R. Barnes | Labour | 599 |
| A. Richards | Lib/Sdp | 550 |
| T. Bray | Lib/Sdp | 408 |
| I. Mullins | Labour | 401 |
| A. Keverne | Independent | 401 |
| P. Barron | ICOTE | 376 |
| D. Sweetman | Conservative | 341 |
Redruth South3 seats · turnout 26.9%
| D. Jeffery | Conservative | 643 |
| K. Rule | Lib/Sdp | 534 |
| P. Aston | Lib/Sdp | 512 |
| R. McLellan | Lib/Sdp | 501 |
| C. Hailey | Labour | 448 |
| R. Martin | Labour | 439 |
| B. Beckinsale | Independent | 434 |
St Day, Lanner and Carharrack3 seats · turnout 29.7%
| G. Mason | Lib/Sdp | 868 |
| J. Thomas | Lib/Sdp | 862 |
| A. McGough | Lib/Sdp | 847 |
| E. Spargo | Ind Con | 550 |
| D. James | Labour | 325 |
| B. Scarlett | Labour | 251 |
St Keverne1 seat
| J. Rogers | Independent | 0 ✓ |
Stithians1 seat
| J. Plummer | MK | 0 ✓ |
Wendron & Sithney2 seats
| J. Wearne | Independent | 0 ✓ |
| C. Thomas | Independent | 0 ✓ |