Before (end of 1986) (34 seats, Elections Centre)
Conservative 18 · Labour 12 · Other 3 · SDP-Liberal Alliance 1
After (end of 1987) (34 seats, Elections Centre)
Conservative 21 · Labour 9 · Other 3 · SDP-Liberal Alliance 1
Ward results
Castle3 seats
| P Robinson | Labour | 968 ✓ |
| R Bell | Labour | 882 ✓ |
| M Dew | Conservative | 851 ✓ |
| C Ford | Conservative | 797 |
| D Williams | Labour | 765 |
| J Savani | Conservative | 756 |
| D Edwards | Lib/Sdp | 467 |
Croyland3 seats · turnout 29.0%
| E. Coleman | Labour | 1,068 |
| L. Edwards | Labour | 891 |
| R. Jackson | Labour | 818 |
| B. Thomas | Conservative | 462 |
| J. Murphy | Conservative | 455 |
| H. Kightley | COMM | 73 |
Earls Barton3 seats · turnout 47.8%
| G. Blackwell | Labour | 1,106 |
| G. Course | Conservative | 798 |
| J. Lee | Conservative | 782 |
| Lees A. | Conservative | 663 |
| D. Tobin | Labour | 592 |
| R. Cotter | Labour | 583 |
| E. Beare | Lib/Sdp | 384 |
| R. Green | Lib/Sdp | 362 |
Finedon2 seats · turnout 53.7%
| Jim Bailey | Conservative | 1,050 |
| B. Foster | Conservative | 935 |
| Helena Reynolds | Labour | 912 |
| L. Warner | Labour | 719 |
Great Doddington and Wilby1 seat · turnout 57.2%
| G. Addis | Conservative | 497 |
| S. Perkins | Lib/Sdp | 221 |
| G. Ryan | Labour | 97 |
Hemmingwell3 seats · turnout 31.5%
| Brock M. | Conservative | 1,077 |
| Malcolm Waters | Conservative | 1,004 |
| D. Boot | Labour | 508 |
| S. Hayton | Labour | 505 |
| M. Paling | Labour | 475 |
| M. Jones | Lib/Sdp | 427 |
| G. Smart | Lib/Sdp | 379 |
Irchester3 seats · turnout 47.5%
| L. Stringer | Lib/Sdp | 938 |
| G. Willmott | Conservative | 741 |
| C. Dubois | Conservative | 662 |
| D. Millwood | Conservative | 612 |
| K. Sims | Lib/Sdp | 598 |
| G. Scott | Labour | 540 |
| K. Clements | Lib/Sdp | 502 |
| R. Parker | Labour | 423 |
| A. Taylor | Labour | 401 |
North1 seat · turnout 52.1%
| G. Timms | Conservative | 480 |
| P. Heywood | Lib/Sdp | 256 |
| J. Roche | Independent | 172 |
Queensway3 seats · turnout 26.5%
| M. Barker | Labour | 803 |
| G. Ridge | Labour | 745 |
| A. Paling | Labour | 707 |
| R. Smith | Conservative | 544 |
| M McGee | Conservative | 532 |
Redwell2 seats · turnout 43.7%
| J. Bush | Conservative | 1,029 |
| A. Northen | Conservative | 1,025 |
| R. Cheney | Lib/Sdp | 514 |
| D. Peile | Lib/Sdp | 454 |
| J. Beckwith | Labour | 221 |
| N. Hayes | Labour | 198 |
South1 seat
| S. Partridge-Underwood | Conservative | 581 ✓ |
| P. O'Connor | Labour | 131 |
Swanspool3 seats · turnout 39.3%
| J. Jessop | Independent | 1,282 |
| E. Stanton | Independent | 1,277 |
| G. Burgess | Independent | 1,223 |
| V. Knight | Labour | 579 |
| Rosemary Abram | Labour | 554 |
| H. Joseph | Labour | 532 |
West1 seat · turnout 58.1%
| R. Fairhurst | Conservative | 533 |
| W. Urmson | Lib/Sdp | 168 |
| D. Foskett | Labour | 70 |
Wollaston2 seats · turnout 47.8%
| Eileen Higgins | Conservative | 796 |
| W. Loakes | Conservative | 709 |
| P. Blackwell | Labour | 422 |
| E. Plumb | Labour | 315 |
| A. White | Lib/Sdp | 299 |