Before (end of 1976) (70 seats, Elections Centre)
Labour 51 · Conservative 9 · Other 6 · Plaid Cymru - The Party of Wales 2 · The Liberal Party 2
After (end of 1977) (70 seats, Elections Centre)
Labour 41 · Other 16 · Conservative 10 · Plaid Cymru - The Party of Wales 3 · The Liberal Party 0
Ward results
Aberavon East & West3 seats · turnout 40.5%
| C. Crowley | Labour | 2,769 |
| C. Lewis | Labour | 2,600 |
| P. Jones | Labour | 2,397 |
| A. Stanton | RATE | 2,365 |
| R. Thomas | RATE | 2,209 |
| V. Jones | RATE | 2,126 |
Aberavon North1 seat · turnout 30.3%
| R. Hubbard | RATE | 1,981 |
Aberavon South1 seat · turnout 50.5%
| L. Carey | RATE | 1,001 |
| W. Hopkin | Labour | 951 |
| S. Bowen | Plaid Cymru - The Party of Wales | 232 |
Brynmelyn2 seats · turnout 35.6%
| J. Dowdle | Labour | 1,407 |
| J. Adams | Labour | 1,334 |
| P. Morgan | Conservative | 382 |
| M. John | RATE | 348 |
Castle2 seats · turnout 40.3%
| D. Jones | Labour | 945 |
| B. Ludlam | Labour | 893 |
| I. Williams | RATE | 558 |
| B. Mathews | RATE | 508 |
| S. Patriarcia | Conservative | 358 |
Fforest Fach2 seats · turnout 36.1%
| D. Bevan | Labour | 1,292 ✓ |
| V. Alexander | Labour | 1,193 ✓ |
| D. Jones | RATE | 1,115 |
| L. Evans | RATE | 1,091 |
| C. Andrews | Conservative | 767 |
| E. Charles | Conservative | 750 |
| A. Williams | Plaid Cymru - The Party of Wales | 319 |
| D. Morton | Plaid Cymru - The Party of Wales | 305 |
| B. Lewis | COMM | 92 |
Ffynone2 seats · turnout 41.8%
| P. Valerio | Conservative | 1,840 |
| J. Thomas | RATE | 1,383 |
| G. Ashmole | Conservative | 1,296 |
| J. Thomas | Plaid Cymru - The Party of Wales | 456 |
| S. Evans | LIB | 441 |
Glyncorrwg2 seats · turnout 44.7%
| G. Davies | Labour | 1,916 |
| D. Daniels | Labour | 1,733 |
| G. James | RATE | 1,411 |
Gower No.11 seat
| J. Bartlett | Conservative | 0 ✓ |
Gower No.21 seat · turnout 64.5%
| C. Sanders | RATE | 1,660 |
| F. Lord | Labour | 1,407 |
Gower No.31 seat · turnout 61.9%
| P. Bevan | Conservative | 1,565 |
| G. Beynon | RATE | 1,166 |
| M. Thomas | Labour | 273 |
Landore2 seats · turnout 42.0%
| D. Cox | Labour | 1,286 |
| S. John | Labour | 1,237 |
| J. Lewis | RATE | 921 |
| C. Phillips | RATE | 917 |
| R. Thomas | COMM | 97 |
Llansamlet2 seats · turnout 38.0%
| L. Penhaligan | Labour | 2,471 ✓ |
| W. Davies | Labour | 1,931 ✓ |
| C. Phillips | Plaid Cymru - The Party of Wales | 1,181 |
| E. James | RATE | 845 |
| W. Smith | Plaid Cymru - The Party of Wales | 779 |
| C. Stevens | RATE | 773 |
| J. Edgecombe | Conservative | 661 |
| J. Holmes | Conservative | 560 |
Llwchwr No.11 seat · turnout 62.9%
| G. Williams | Labour | 1,410 |
| D. Thomas | Independent | 829 |
| R. Day | Conservative | 576 |
Llwchwr No.22 seats · turnout 35.4%
| D. Davies | Labour | 2,518 |
| J. Jones | Labour | 1,962 |
| E. Thomas | Plaid Cymru - The Party of Wales | 1,780 |
Llwchwr No.32 seats · turnout 50.2%
| J. Thomas | Labour | 1,835 |
| D. Turner | Labour | 1,697 |
| W. Davies | Conservative | 1,301 |
| C. Morgan | Independent | 1,176 |
| M. Bevan | Conservative | 1,167 |
| H. Price | Plaid Cymru - The Party of Wales | 862 |
Margam Central1 seat · turnout 60.8%
| R. James | Labour | 1,146 |
| W. Jones | RATE | 1,006 |
| D. Thomas | Plaid Cymru - The Party of Wales | 218 |
Margam North1 seat · turnout 75.1%
| S. Williams | RATE | 842 |
| T. Morgans | Independent | 789 |
| Johnston K. | Labour | 204 |
Margam West1 seat · turnout 41.1%
| E. Miles | RATE | 1,659 |
Morriston2 seats · turnout 35.7%
| E. Davino | RATE | 2,164 ✓ |
| G. Davies | RATE | 1,511 ✓ |
| D. Harvard | Labour | 1,339 |
| C. Moriarty | Labour | 1,055 |
| C. Reid | Plaid Cymru - The Party of Wales | 935 |
| D. Harris | Plaid Cymru - The Party of Wales | 629 |
| J. Tingey | Conservative | 404 |
Mumbles2 seats · turnout 46.5%
| G. Chilcott | Conservative | 3,348 |
| W. Hughes | Conservative | 2,555 |
| W. Penhale | RATE | 2,185 |
| M. Teasue | RATE | 1,721 |
| M. Coghlin | Labour | 1,151 |
Neath No.14 seats · turnout 36.1%
| F. Kingdom | Labour | 3,003 |
| W. Phillips | Labour | 2,996 |
| D. David | Labour | 2,604 |
| D. Roberts | Labour | 2,546 |
| S. Evans | RATE | 2,143 |
| W. Williams | RATE | 1,954 |
| D. Rees | RATE | 1,905 |
| C. Chapman | LIB | 1,184 |
| G. Jenkins | COMM | 942 |
| W. Pritchard | COMM | 561 |
Neath No.22 seats · turnout 45.7%
| F. Evans | Labour | 2,285 |
| R. Jones | RATE | 1,920 |
| L. Jones | Labour | 1,700 |
| I. Curtis | Plaid Cymru - The Party of Wales | 1,375 |
Neath Rural No.2 seats
| M. Thomas | Independent | 2,440 ✓ |
| R. Jones | Labour | 2,391 ✓ |
| D. Gwyn | Plaid Cymru - The Party of Wales | 2,229 |
| N. Thomas | Labour | 2,089 |
| H. Evans | Plaid Cymru - The Party of Wales | 1,749 |
| C. Jones | Labour | 1,740 |
| D. Davies | Labour | 1,713 |
| R. Davies | Plaid Cymru - The Party of Wales | 1,661 |
| T. Thomas | Labour | 1,621 |
| E. Thresher | Independent | 1,120 |
| D. Florance | Labour | 967 |
| E. Payne | Independent | 922 |
| M. Lewis | Plaid Cymru - The Party of Wales | 752 |
| G. Morgan | COMM | 632 |
| F. Davies | RATE | 601 |
| T. Phillips | Plaid Cymru - The Party of Wales | 589 |
Neath Rural No. 51 seat · turnout 63.3%
| R. Rees | Independent | 1,783 |
| D. Hull | Labour | 1,248 |
Penderry3 seats · turnout 36.5%
| J. Allison | Labour | 2,884 |
| T. Jones | Labour | 2,884 |
| G. Thomas | Labour | 2,759 |
| J. John | RATE | 2,506 |
| G. Griffin | RATE | 2,411 |
| C. Davies | RATE | 2,336 |
| W. Phillips | Plaid Cymru - The Party of Wales | 661 |
| P. Freemen | Plaid Cymru - The Party of Wales | 594 |
| S. John | Plaid Cymru - The Party of Wales | 571 |
Pontardawe No.11 seat · turnout 49.4%
| J. Williams | Independent | 1,159 |
| S. James | Labour | 692 |
Pontardawe No.22 seats · turnout 45.4%
| M. Rees | Ind Lab | 2,576 |
| M. Mulcahy | Plaid Cymru - The Party of Wales | 2,159 |
| W. Bevan | Labour | 1,172 |
| H. Hopkins | Labour | 1,121 |
Pontardawe No.33 seats · turnout 40.6%
| J. Morgan | Independent | 2,828 |
| M. Morgan | Labour | 2,692 |
| W. Rees | Labour | 2,474 |
| B. Morgan | Ind Lab | 2,202 |
| J. Cape | Independent | 2,047 |
| D. James | Plaid Cymru - The Party of Wales | 1,950 |
Sketty3 seats · turnout 47.4%
| S. Vaughan | Conservative | 5,426 |
| S. Perry | Conservative | 5,038 |
| R. Shew | Conservative | 4,689 |
| J. Hamond | RATE | 2,432 |
| C. Jones | RATE | 2,236 |
| J. Rees | Labour | 1,583 |
| J. Cainen | Labour | 1,318 |
| G. Gwent | Plaid Cymru - The Party of Wales | 1,079 |
St.Helens2 seats · turnout 48.5%
| C. Dilley | Conservative | 1,529 |
| M. Whitiah | Conservative | 1,244 |
| D. Meager | RATE | 1,023 |
| M. Smith | RATE | 826 |
| P. Duffan | Plaid Cymru - The Party of Wales | 425 |
St.Johns2 seats · turnout 47.5%
| N. Tabram | Labour | 1,237 ✓ |
| A. Morris | Labour | 1,158 ✓ |
| R. Williams | RATE | 740 |
| W. John | RATE | 720 |
| B. Tovey | Conservative | 425 |
| G. Williams | Conservative | 403 |
| R. Williams | Plaid Cymru - The Party of Wales | 316 |
| R. Jones | Plaid Cymru - The Party of Wales | 293 |
St.Thomas2 seats · turnout 47.1%
| I. Morgan | Labour | 1,467 |
| K. Hare | Labour | 1,389 |
| A. Trick | RATE | 1,132 |
| D. Hale | RATE | 1,080 |
| R. Lewis | Conservative | 279 |
Townhill2 seats · turnout 35.9%
| T. Wignall | Labour | 1,464 |
| T. Evans | Labour | 1,460 |
| A. Lloyd | Conservative | 496 |
| L. Tyler | Conservative | 436 |
| A. Westwood | RATE | 400 |
| D. Mills | RATE | 375 |
Victoria2 seats · turnout 50.3%
| D. Jenkins | RATE | 1,193 ✓ |
| S. Jenkins | RATE | 1,009 ✓ |
| A. Jenkins | Conservative | 630 |
| C. Hammacott | Labour | 580 |
| L. Martin | Labour | 528 |
| K. Olsen | Conservative | 499 |
| G. Farmer | Plaid Cymru - The Party of Wales | 128 |
