Before (end of 1975)
Not known.
After (end of 1976)
Not known.
Ward results
Bedlinog3 seats · turnout 48.8%
| D. Cooke | Labour | 967 |
| J. Bromley | Labour | 962 |
| V. Davies | Labour | 873 |
| D. Jones | Plaid Cymru - The Party of Wales | 790 |
| G. Roberts | Plaid Cymru - The Party of Wales | 633 |
Cyfartha3 seats · turnout 49.7%
| M. Phillips | Plaid Cymru - The Party of Wales | 1,734 |
| T. Rees | Plaid Cymru - The Party of Wales | 1,412 |
| L. Edwards | Plaid Cymru - The Party of Wales | 1,214 |
| T. Gamlin | Labour | 988 |
| K. Thomas | Labour | 843 |
| D. Morrison | Labour | 840 |
| D. Williams | LIB | 439 |
Park Ward6 seats · turnout 41.1%
| G. Foster | Plaid Cymru - The Party of Wales | 2,300 |
| L. Foster | Plaid Cymru - The Party of Wales | 1,980 |
| G. Thomas | Plaid Cymru - The Party of Wales | 1,853 |
| W. Matthews | Plaid Cymru - The Party of Wales | 1,833 |
| M. Morris | Plaid Cymru - The Party of Wales | 1,769 |
| W. Thomas | Plaid Cymru - The Party of Wales | 1,722 |
| J. Burns | Labour | 1,609 |
| D. Williams | Labour | 1,434 |
| G. Williams | Labour | 1,384 |
| J. Cleary | Labour | 1,278 |
| G. Lewis | Labour | 1,249 |
| J. Stanfield | Labour | 1,244 |
| A. Jones | COMM | 978 |
| G. Cooper | LIB | 630 |
| T. Strachan | COMM | 372 |
| C. Davies | COMM | 319 |
| E. Morgan | Independent | 265 |
Town Ward3 seats · turnout 46.1%
| G. Donavan | Labour | 1,244 |
| W. Morgan | Labour | 1,124 |
| R. Howells | Plaid Cymru - The Party of Wales | 1,116 |
| L. Smith | Plaid Cymru - The Party of Wales | 1,115 |
| W. Thomas | Labour | 1,104 |
| T. Roberts | COMM | 430 |
| D. Battell-Higgins | LIB | 409 |
| C. Gennett | COMM | 245 |
Vaynor3 seats · turnout 58.0%
| M. John | Independent | 979 |
| D. Barlow | Plaid Cymru - The Party of Wales | 941 |
| M. Chambers | Labour | 695 |
| T. Smith | Labour | 664 |
| A. Jenkins | LIB | 609 |
| V. Protheroe | Labour | 589 |