Before (end of 1980) (85 seats, Elections Centre)
Labour 48 · Plaid Cymru - The Party of Wales 18 · Other 9 · Conservative 8 · The Liberal Party 2
After (end of 1981) (85 seats, Elections Centre)
Labour 63 · Plaid Cymru - The Party of Wales 10 · Other 7 · Conservative 3 · SDP-Liberal Alliance 2
Ward results
Abercedin Bettws Pontyrhyll Nantymo2 seats · turnout 47.2%
| E. Merriman | Plaid Cymru - The Party of Wales | 2,670 |
| A. Lock | Labour | 2,474 |
| D. Hughes | Labour | 2,364 |
| J. Jones | Plaid Cymru - The Party of Wales | 1,855 |
| S. Thomas | Conservative | 261 |
| R. Cave | Conservative | 190 |
Aberdare No.1 Llwydcoed2 seats · turnout 29.8%
| J. Powell | Labour | 2,104 |
| M. Prowle | Labour | 1,956 |
| D. Higgins | LIB | 1,078 |
Aberdare No.2 Blaengwawr1 seat · turnout 53.7%
| E. Owen | Plaid Cymru - The Party of Wales | 1,728 |
| B. Fitzgerald | Labour | 1,571 |
Aberdare No.3 Gladlys1 seat · turnout 38.6%
| V. Llewellyn | Labour | 852 |
| L. Rosser | Independent | 605 |
Aberdare No.4 Town1 seat · turnout 48.5%
| P. Williams | Independent | 743 |
| A. Williams | Labour | 694 |
| M. Thomas | Plaid Cymru - The Party of Wales | 229 |
Aberdare No.5 Aberaman1 seat · turnout 38.8%
| R. Reed | Labour | 0 ✓ |
Abertidwr & Senghenydd [caerphill1 seat · turnout 43.6%
| J. Davies | Residents | 1,484 ✓ |
| E. Wright | Labour | 817 |
Bedwas & Machen2 seats · turnout 41.0%
| R. Davies | Labour | 2,897 |
| A. Donaldson | LIB | 2,799 |
| E. Gwynne | Labour | 2,279 |
Bedwellty No.1 (Aberbargoed)1 seat · turnout 51.7%
| M. Collis | Labour | 838 |
| K. Szerard | Plaid Cymru - The Party of Wales | 673 |
Bedwellty No.21 seat · turnout 44.4%
| R. Powell | Labour | 1,457 |
| W. Hyde | Plaid Cymru - The Party of Wales | 440 |
Blaengarw & Pontycymmer1 seat · turnout 66.5%
| D. Mordecai | Ind RA | 1,144 |
| G. Mackay | Labour | 633 |
| R. Smiles | Independent | 402 |
Bridgend2 seats · turnout 39.9%
| F. Bertorelli | Conservative | 1,648 ✓ |
| R. Bowser | Labour | 1,548 ✓ |
| H. Davies | Labour | 1,547 |
| W. Rutter | Conservative | 1,512 |
| P. Roberts | RATE | 1,372 |
| B. Ellis | RATE | 1,220 |
| R. Evans | Independent | 703 |
Caerphilly No.11 seat · turnout 52.8%
| L. Lewis | Labour | 985 |
| A. Morgan | Plaid Cymru - The Party of Wales | 361 |
| N. Lewis | LIB | 309 |
Caerphilly No.2 Llanbradach1 seat · turnout 55.4%
| C. Mann | Plaid Cymru - The Party of Wales | 1,643 |
| E. Piper | Labour | 878 |
Caerphilly No.41 seat · turnout 51.0%
| B. Rowland | Labour | 1,734 ✓ |
| L. Whittle | Plaid Cymru - The Party of Wales | 1,212 |
| A. Lambert | LIB | 477 |
| R. Bisley | Conservative | 291 |
Caerphilly No.5 North1 seat · turnout 45.5%
| R. Jewell | Labour | 1,035 |
| P. Bevan | Plaid Cymru - The Party of Wales | 810 |
Caerphilly No.6 South1 seat · turnout 48.3%
| G. Snell | Labour | 798 ✓ |
| M. Ryland | Independent | 706 |
| G. Hibbert | Plaid Cymru - The Party of Wales | 234 |
| P. Lewis | RATE | 224 |
| L. Price | LIB | 168 |
Caerphilly No.7 Pentyrch & Taffs1 seat · turnout 47.8%
| P. Williams | Plaid Cymru - The Party of Wales | 1,814 |
| R. Toghill | Labour | 1,067 |
Cardiff Rural1 seat · turnout 41.8%
| C. Richards | Labour | 1,233 |
| A. Goodchild | RATE | 798 |
Cowbridge Rural1 seat · turnout 41.0%
| J. David | Independent | 1,285 |
| I. Williams | Labour | 873 |
| J. Davies | Plaid Cymru - The Party of Wales | 493 |
Coychurch Ewenny Merthyr Mawr & W1 seat · turnout 44.4%
| D. Thomas | Independent | 1,112 |
| L. Walters | Conservative | 873 |
Gelligaer No.11 seat · turnout 48.9%
| N. Harris | Labour | 1,735 |
| G. Howells | Plaid Cymru - The Party of Wales | 863 |
Gelligaer No.21 seat · turnout 48.4%
| J. Davies | Labour | 684 |
| J. Bromley | Independent | 619 |
| G. Blenkin | Plaid Cymru - The Party of Wales | 103 |
Gelligaer No.31 seat · turnout 45.1%
| W. Coleman | Labour | 1,842 |
| J. Jones | Plaid Cymru - The Party of Wales | 1,327 |
Gelligaer No.42 seats · turnout 27.7%
| W. Bowen | Labour | 2,580 |
| B. Lloyd | Labour | 2,485 |
| J. Howard | Conservative | 662 |
Llangeinor Sarn Bryncethin Coy-Tra-2 seats · turnout 43.0%
| P. Squire | Labour | 2,334 ✓ |
| Walter G. | Labour | 2,229 ✓ |
| D. Jones | Plaid Cymru - The Party of Wales | 492 |
| D. Thomas | Independent | 479 |
| M. Powell | Conservative | 476 |
| A. Rees | Plaid Cymru - The Party of Wales | 458 |
| C. Smart | Conservative | 355 |
| D. Bonner | Labour | 4,105 |
| L. Lodwig | Labour | 4,090 |
| R. Selwood | Labour | 3,747 |
| H. Prosser | Labour | 3,735 |
| T. John | RATE | 3,089 |
| I. Bowen | Plaid Cymru - The Party of Wales | 2,400 |
| D. Watkins | Plaid Cymru - The Party of Wales | 1,730 |
| J. Canning | Plaid Cymru - The Party of Wales | 1,609 |
| G. Morris | Plaid Cymru - The Party of Wales | 1,566 |
| R. Bunnage | Conservative | 1,552 |
| J. Bunnage | Conservative | 1,534 |
| L. Hunt | Conservative | 1,499 |
Llantrisant & Llantwit Fardre No.2 seats · turnout 42.0%
| D. McDonald | Labour | 2,776 |
| W. Hall | Labour | 2,163 |
| G. Jury | RES | 1,101 |
| R. Brinson | Independent | 1,060 |
| H. Deardon | RES | 775 |
| R. Williams | Plaid Cymru - The Party of Wales | 741 |
Maesteg No.11 seat
| V. Hart | Labour | 0 ✓ |
Maesteg No.21 seat · turnout 59.3%
| J. Jones | Labour | 1,364 |
| J. Gibbs | LIB | 1,171 |
Maesteg No.31 seat · turnout 44.8%
| L. Jenkins | Labour | 1,676 |
| I. Williams | Plaid Cymru - The Party of Wales | 368 |
| K. Rowe | Conservative | 198 |
Merthyr Cyfarthfa1 seat · turnout 46.3%
| M. Phillips | Plaid Cymru - The Party of Wales | 1,480 |
| K. Thomas | Labour | 1,091 |
Merthyr No.61 seat · turnout 61.5%
| H. Jones | Labour | 1,632 |
| C. Foley | Plaid Cymru - The Party of Wales | 937 |
Merthyr No.71 seat · turnout 67.8%
| T. O'Brien | Labour | 1,154 |
| E. Bartlett | Plaid Cymru - The Party of Wales | 1,045 |
Merthyr Park2 seats · turnout 36.2%
| J. Burns | Labour | 1,810 ✓ |
| J. Cleary | Labour | 1,615 ✓ |
| G. Foster | Plaid Cymru - The Party of Wales | 1,265 |
| D. Thomas | Plaid Cymru - The Party of Wales | 822 |
| A. Jones | COMM | 627 |
| G. Cooper | LIB | 495 |
| C. Dennett | COMM | 155 |
| R. Gould | Other | 109 |
Merthyr Town1 seat · turnout 47.3%
| T. Davies | Labour | 1,056 ✓ |
| R. Howells | Independent | 840 |
| E. Horne | Conservative | 252 |
| T. Roberts | COMM | 131 |
Mountain Ash No.11 seat · turnout 47.0%
| T. Davies | Labour | 1,723 |
| G. Jones | Plaid Cymru - The Party of Wales | 1,137 |
Mountain Ash No.21 seat · turnout 41.7%
| F. Edwards | Labour | 1,215 |
| N. Thomas | Plaid Cymru - The Party of Wales | 953 |
Mountain Ash No.32 seats · turnout 32.9%
| H. Evans | Labour | 1,870 |
| P. Jarman | Plaid Cymru - The Party of Wales | 1,801 |
| S. Lloyd | Labour | 1,717 |
Penybont No.11 seat · turnout 42.0%
| R. Jenkins | Labour | 1,005 ✓ |
| F. Beer | Independent | 672 |
| G. Griffiths | Conservative | 611 |
| E. Phillips | Ind RA | 319 |
Penybont No.31 seat · turnout 47.4%
| W. Philpin | Labour | 1,775 ✓ |
| J. Spurgeon | Conservative | 826 |
| J. Ogden | Independent | 304 |
| B. Williams | Plaid Cymru - The Party of Wales | 173 |
Penybont No.41 seat · turnout 42.6%
| D. Unwin | Conservative | 1,407 |
| G. Stevens | Labour | 1,044 |
| R. Fattorini | Plaid Cymru - The Party of Wales | 291 |
Penybont No.52 seats · turnout 43.4%
| E. Davies | Labour | 3,579 |
| M. Jones | Labour | 3,463 |
| M. Eade | Conservative | 725 |
| K. Burnell | Plaid Cymru - The Party of Wales | 677 |
| W. Jones | Conservative | 672 |
| P. Tomlin | Plaid Cymru - The Party of Wales | 623 |
Penydarren1 seat
| T. Mahoney | Labour | 0 ✓ |
Pontypridd1 seat · turnout 52.1%
| W. Williams | Labour | 1,129 |
| S. Holcombe | Plaid Cymru - The Party of Wales | 503 |
| K. James | Independent | 405 |
Pontypridd No.2 Town1 seat · turnout 57.1%
| C. Jones | Plaid Cymru - The Party of Wales | 986 |
| W. Jones | Labour | 950 |
| B. Murphy | LIB | 560 |
Pontypridd No.3 Clifynydd1 seat · turnout 48.9%
| A. Davies | Labour | 723 |
| G. Watkins | Plaid Cymru - The Party of Wales | 229 |
| S. Belzak | Conservative | 105 |
Pontypridd No.4 Trallwn1 seat · turnout 48.6%
| M. Murphy | LIB | 1,001 |
| P. Hill | Labour | 369 |
| G. Gregory | Plaid Cymru - The Party of Wales | 166 |
Pontypridd No.5 Rhydyfelin1 seat · turnout 30.7%
| J. Davies | Labour | 1,495 |
| J. Biddulph | Plaid Cymru - The Party of Wales | 368 |
| B. Morgan-Lewis | Conservative | 261 |
Pontypridd No.6 Treforest & Graig1 seat · turnout 37.2%
| H. Weston | Labour | 1,255 |
| E. Watkins | Plaid Cymru - The Party of Wales | 516 |
| L. Jarman | Conservative | 168 |
Porthcawl No.11 seat · turnout 44.4%
| P. Hubbard-Miles | Conservative | 1,927 |
| A. Thomas | Labour | 1,260 |
Porthcawl No.21 seat · turnout 45.8%
| G. McBride | Labour | 1,279 |
| G. Fairley | Conservative | 1,109 |
Rhondda No.1 Treherbert2 seats · turnout 59.4%
| D. Williams | Labour | 1,980 |
| A. True | COMM | 1,818 |
| I. Lisle | Labour | 1,395 |
| G. Davies | Plaid Cymru - The Party of Wales | 1,254 |
| S. Macmillan | Plaid Cymru - The Party of Wales | 553 |
Rhondda No.10 Tylerstown1 seat · turnout 48.1%
| M. Chard | RATE | 1,288 |
| D. Morgan | Labour | 1,061 |
| T. Lewis | Plaid Cymru - The Party of Wales | 304 |
Rhondda No.11 Ferndale2 seats · turnout 51.4%
| G. James | Plaid Cymru - The Party of Wales | 2,315 |
| P. Davies | Labour | 1,723 |
| R. Morris | Independent | 1,703 |
| J. Brough | Labour | 1,647 |
Rhondda No.2 Treorchy2 seats
| H. Jones | Labour | 0 ✓ |
| G. Rees | Labour | 0 ✓ |
Rhondda No.3 Pentre1 seat · turnout 44.4%
| W. Gough | Labour | 1,240 |
| M. Powell | Plaid Cymru - The Party of Wales | 720 |
Rhondda No.51 seat · turnout 56.2%
| E. Emmanuel | Labour | 1,899 |
| D. Morgan | Plaid Cymru - The Party of Wales | 1,085 |
Rhondda No.61 seat · turnout 50.3%
| E. Harris | Labour | 1,941 |
| P. Leyshon | Conservative | 648 |
| C. Pugh | Plaid Cymru - The Party of Wales | 255 |
Rhondda No.7 Penygraig1 seat
| C. Richards | Labour | 0 ✓ |
Rhondda No.8 Porth2 seats · turnout 44.8%
| A. Ellis | Labour | 2,123 |
| L. Rees | Labour | 2,046 |
| T. Rees | RATE | 1,494 |
| R. Dentus | RATE | 1,469 |
Rhondda No.91 seat · turnout 56.5%
| A. Williams | Labour | 1,475 |
| D. May | RATE | 1,155 |
Rhymney1 seat · turnout 41.4%
| J. Williams | Labour | 1,679 |
| A. Cosh | Plaid Cymru - The Party of Wales | 170 |
Treharris1 seat
| T. Richards | Labour | 0 ✓ |
Vaynor & Penderyn1 seat · turnout 57.9%
| C. Harris | Plaid Cymru - The Party of Wales | 972 |
| I. Holt | Labour | 834 |
Vaynor & Penderyn No.21 seat · turnout 53.9%
| M. Chambers | Labour | 804 |
| T. Smith | Independent | 636 |
