Before (end of 1983) (47 seats, Elections Centre)
Labour 36 · Conservative 11 · Plaid Cymru - The Party of Wales 0 · Other 0 · SDP-Liberal Alliance 0
After (end of 1984) (47 seats, Elections Centre)
Labour 35 · Conservative 11 · SDP-Liberal Alliance 1 · Other 0 · Plaid Cymru - The Party of Wales 0
Ward results
Allt-Yr-Yn1 seat
| T. Warren | Conservative | 1,799 |
| V. Penn | Labour | 588 |
| R. Dearth | Lib/Sdp | 532 |
Alway1 seat
| R. Truman | Labour | 1,228 ✓ |
| A Martin | Conservative | 830 |
| P. Hobday | Lib/Sdp | 267 |
| J. Pumford | Ind Lab | 121 |
| R. Simmons | Plaid Cymru - The Party of Wales | 36 |
Bettws1 seat
| Watson S. | Labour | 1,677 |
| R. Silcock | Conservative | 384 |
Caerleon1 seat
| S. Bertie | Conservative | 1,457 |
| R Rees | Labour | 1,403 |
| H. Ap Daffydd | Plaid Cymru - The Party of Wales | 48 |
Gaer1 seat
| S. Fairie | Labour | 1,829 ✓ |
| G Williams | Conservative | 773 |
| L. Selwood | Lib/Sdp | 374 |
| R. Shakesheff | Ecol | 91 |
Liswerry1 seat
| R. Lloyd | Labour | 1,507 |
| M. Hughes | Conservative | 780 |
| M. Paignton | Lib/Sdp | 325 |
Pillgwenlly1 seat
| E. Travers | Labour | 1,144 |
| P. Davies | Conservative | 590 |
| P. Fitzgerald | Plaid Cymru - The Party of Wales | 47 |
Ringland1 seat
| W. Jenkins | Labour | 0 ✓ |
Rogerstone1 seat
| L. Crabb | Conservative | 1,221 |
| J. Brooks | Labour | 1,158 |
Shaftesbury1 seat
| A. Jones | Labour | 1,170 |
| D Jewitt | Conservative | 608 |
St. Julians1 seat
| J. Waggett | Labour | 1,310 |
| R. Williams | Conservative | 1,153 |
| J. Coghlan | Lib/Sdp | 480 |
Stow Hill1 seat
| G Davies | Conservative | 737 |
| D. Chantler | Labour | 725 |
Victoria1 seat
| B. Williams | Labour | 1,106 |
| W. Morris | Conservative | 499 |
| N. Cox | Lib/Sdp | 216 |
