Before (end of 1998) (34 seats, Elections Centre)
Labour 17 · Conservative 14 · Other 3 · Liberal Democrats 0
After (end of 1999) (36 seats, Elections Centre)
Labour 20 · Conservative 15 · Other 1 · Liberal Democrats 0
Ward results
Castle3 seats
| P. Crofts | Labour | 1,084 ✓ |
| Shashikant Dholakia | Labour | 1,071 ✓ |
| M. Prescod | Labour | 979 ✓ |
| Y. Miles | Conservative | 579 |
| S. Patel | Conservative | 566 |
Croyland3 seats
| E. Coleman | Labour | 879 ✓ |
| A. Scarborough | Labour | 715 ✓ |
| A. Taylor | Labour | 714 ✓ |
| R. Craig | Conservative | 503 |
| J. Kingshott | Conservative | 419 |
Earls Barton3 seats
| G. Blackwell | Labour | 1,283 ✓ |
| M. Cahill | Labour | 1,162 ✓ |
| R. Cotter | Labour | 1,059 ✓ |
| Timothy Allebone | Conservative | 614 |
| C. Benham | Conservative | 534 |
| A. Teal | Conservative | 477 |
Finedon2 seats
| Helena Reynolds | Labour | 697 ✓ |
| James Bailey | Conservative | 687 ✓ |
| B. Kendall-Torry | Conservative | 517 |
| Luke Warner | Labour | 479 |
Great Doddington and Wilby1 seat · turnout 51.5%
| D. Smith | Conservative | 530 |
| S. Perkins | Labour | 205 |
Hemmingwell3 seats · turnout 34.0%
| Brock M. | Conservative | 1,064 |
| Malcolm Waters | Conservative | 963 |
| B. Devine | Conservative | 939 |
| K Davies | Labour | 564 |
| S. Karley | Labour | 512 |
| N. Vaid | Labour | 468 |
| J. Watts | Independent | 202 |
Irchester3 seats
| J. Mann | Labour | 1,055 ✓ |
| John Mullen | Labour | 921 ✓ |
| M May | Labour | 874 ✓ |
| J. Lyne | Conservative | 573 |
Queensway3 seats
| G. Ryan | Labour | 843 ✓ |
| G. Ridge | Labour | 818 ✓ |
| Graham John Sherwood | Labour | 783 ✓ |
| L. Brannan | Conservative | 348 |
| S. Goodman | Conservative | 342 |
| R. Dean | Conservative | 337 |
Redwell East2 seats · turnout 38.9%
| A. Warwick | Conservative | 853 |
| Ken Harrington | Conservative | 807 |
| J. Ashton | Labour | 528 |
| T. McCullagh | Labour | 476 |
South1 seat · turnout 46.9%
| S. Partridge-Underwood | Conservative | 557 |
| T. Maguire | Labour | 165 |
Swanspool3 seats
| M Ellis | Labour | 899 ✓ |
| A Henley | Labour | 817 ✓ |
| Suzanne Janssens | Labour | 812 ✓ |
| P Bell | Conservative | 705 |
| Karen James | Conservative | 668 |
| P Brannan | Conservative | 637 |
| D Nesbitt | Independent | 424 |
West1 seat · turnout 62.6%
| K. Payne | Independent | 405 |
| D. Bletsoe-Brown | Conservative | 219 |
| D. Slater | Independent | 153 |
| Robert Johnson | Labour | 91 |
Wollaston2 seats
| Eileen Higgins | Conservative | 686 ✓ |
| Andrew Bailey | Conservative | 628 ✓ |
| T. Savage | Labour | 461 |
| J. Cawley | Labour | 321 |