Before (end of 1998) (65 seats, Elections Centre)
Labour 52 · Other 9 · Plaid Cymru - The Party of Wales 3 · Liberal Democrats 1 · Conservative 0
After (end of 1999) (64 seats, Elections Centre)
Labour 40 · Other 12 · Plaid Cymru - The Party of Wales 10 · Liberal Democrats 2 · Conservative 0
Ward results
Aberavon3 seats
| A. Taylor | Social Democratic Federation | 1,191 ✓ |
| J. Dinham | Social Democratic Federation | 973 ✓ |
| T. Sullivan | Social Democratic Federation | 852 ✓ |
| Andrew Richard Jones | Labour | 640 |
| K. Price | Labour | 635 |
| J. Slater | Labour | 616 |
Aberdulais1 seat
| E. Jones | Labour | 0 |
Baglan3 seats
| A. Wheatley | RATE | 1,358 ✓ |
| M. Harris | Labour | 1,292 ✓ |
| Paul Evans | RATE | 1,219 ✓ |
| E. Tyrell | RATE | 1,120 |
| M. Golding | Labour | 1,100 |
| L. Rees | Labour | 1,047 |
| W. Morris | Conservative | 293 |
Blaengwrach1 seat · turnout 50.3%
| A. Edwards | PC | 397 |
| D. Hughes | Labour | 369 |
Briton Ferry East1 seat · turnout 43.4%
| C. Moragn | Labour | 674 |
| I. Sherwood | Liberal Democrats | 375 |
Briton Ferry West1 seat · turnout 40.6%
| S. Atherton | Labour | 659 |
| G. Lewis | Liberal Democrats | 255 |
Bryn & Cwmavon3 seats
| G Williams | Labour | 1,028 ✓ |
| T Morgans | Ind Lab | 948 ✓ |
| T John | Labour | 884 ✓ |
| M Harris | Liberal Democrats | 874 |
| E Williams | Labour | 809 |
| Brinley Roblin | Independent | 734 |
| T Rodgers | Liberal Democrats | 607 |
| P Parry | RATE | 495 |
Bryn-coch North1 seat · turnout 52.8%
| R. Mathews | Labour | 531 |
| D. Thomas | PC | 321 |
| T. Parkinson | Liberal Democrats | 155 |
Bryn-coch South2 seats
| G. Richards | Plaid Cymru - The Party of Wales | 983 ✓ |
| P. Phillips | Labour | 902 ✓ |
| K. Palmer | Labour | 863 |
Cadoxton1 seat · turnout 50.9%
| G. Funning | Labour | 331 |
| R. King | PC | 261 |
Cimla2 seats
| John Warman | Liberal Democrats | 893 ✓ |
| R. Teale | Labour | 804 ✓ |
| D. Williams | Labour | 475 |
Coedffranc Central2 seats
| G. Morgan | Plaid Cymru - The Party of Wales | 701 ✓ |
| Betsan Powell | Independent | 663 ✓ |
| Arthur Davies | Labour | 529 |
| Des Davies | Labour | 440 |
| M. Bond | Ind Lab | 271 |
Coedffranc North1 seat
| D. Davies | Liberal Democrats | 434 ✓ |
| Doreen Jones | Labour | 382 |
Coedffranc West1 seat · turnout 42.7%
| H. Bebell | Labour | 314 |
| H. Phillips | PC | 249 |
| R. Lloyd | Liberal Democrats | 141 |
Cwmllynfell1 seat
| I. Griffiths | Labour | 0 |
Cymmer1 seat · turnout 48.1%
| M. Goodridge | Independent | 623 |
| D. Stokes | Labour | 511 |
Glyncorrwg1 seat
| H. Rawlings | Labour | 0 |
Glynneath2 seats
| J. Morgan | Plaid Cymru - The Party of Wales | 987 ✓ |
| Horace Lewis | Plaid Cymru - The Party of Wales | 716 ✓ |
| D. Williams | Labour | 653 |
| Jacqueline Joseph | Labour | 460 |
Godre'r Graig1 seat · turnout 49.5%
| J. Myers | Labour | 312 |
| R. Davies | PC | 262 |
Gwaun-Cae-Gurwen1 seat · turnout 57.3%
| C. Bevan | PC | 731 |
| G. Jones | Labour | 445 |
| D. James | Independent | 87 |
Lower Brynamman1 seat
| A. Woolcock | Labour | 0 |
Neath East3 seats
| C Henreywood | Labour | 1,214 ✓ |
| S Miller | Labour | 1,022 ✓ |
| Sheila Penry | Labour | 1,003 ✓ |
| B Cathail | Plaid Cymru - The Party of Wales | 590 |
| Richard Moth | Liberal Democrats | 402 |
Neath North2 seats · turnout 46.1%
| D. Vaughan | Labour | 1,114 |
| E. Loaring | Labour | 738 |
| C. Thomas | Ind Lab | 690 |
| T. Phillips | Ind Lab | 456 |
Neath South2 seats
| M. Gunter | Labour | 0 |
| P. Rees | Labour | 0 |
Pontardawe2 seats · turnout 41.1%
| D. Evans | PC | 895 |
| R. Williams | PC | 647 |
| M. Lloyd-James | Labour | 623 |
| J. Jenkins | Labour | 617 |
| H. Williams | Independent | 499 |
Port Talbot3 seats · turnout 41.3%
| Pamela Spender | RATE | 1,056 |
| S. Thomas | RATE | 977 |
| A. Tutton | RATE | 709 |
| C. Main | Labour | 604 |
| S. Dafydd | Labour | 574 |
| J. Braemar-Blood | Labour | 518 |
| A. Thomas | Independent | 490 |
| Steve Davies | PC | 429 |
Resolven1 seat · turnout 50.8%
| D. Davies | Labour | 850 |
| C. Gillard | PC | 411 |
Sandfields East3 seats
| Lella James | Independent | 1,252 ✓ |
| T. Crowley | Labour | 1,170 ✓ |
| Collin Crowley | Labour | 1,147 ✓ |
| Patricia Jones | Labour | 806 |
| Leslie Davies | RATE | 736 |
| R. Pursey | RATE | 598 |
| Tom Hunter-Watts | Liberal Democrats | 572 |
Sandfields West3 seats
| Olga Jones | Labour | 1,235 ✓ |
| P. Thomas | Labour | 1,173 ✓ |
| W. Harris | Labour | 1,128 ✓ |
| Stephen Griffiths | RATE | 950 |
| Kelvin Edwards | Plaid Cymru - The Party of Wales | 824 |
Seven Sisters1 seat · turnout 50.8%
| P. Lloyd | Labour | 603 |
| S. Jones | Independent | 249 |
Tai-bach2 seats
| J. Rodgers | Labour | 1,220 |
| C. Owen | Labour | 1,121 |
| J. Sullivan | RATE | 548 |
| S. Sullivan | RATE | 446 |
Tonna1 seat · turnout 48.9%
| J. Miles | Labour | 639 |
| Branwen Evans | PC | 288 |
Trebanos1 seat
| Joseph Edwards | Labour | 412 ✓ |
| A. Tyrell | Liberal Democrats | 91 |
Ystalyfera1 seat · turnout 58.9%
| Llewelyn A. | PC | 973 |
| I. Irranca-Davies | Labour | 487 |
