Before (end of 1983) (35 seats, Elections Centre)
Conservative 16 · Labour 12 · Other 7 · SDP-Liberal Alliance 0
After (end of 1984) (35 seats, Elections Centre)
Conservative 17 · Labour 12 · Other 5 · SDP-Liberal Alliance 1
Ward results
Melcombe Regis1 seat · turnout 45.9%
| J. Nagel | Conservative | 798 |
| T. Thomas | Lib/Sdp | 596 |
| P. Watkins | Labour | 130 |
North Central1 seat · turnout 41.3%
| I. Sanderson | Conservative | 681 |
| T. Mockridge | Labour | 503 |
| J. Robbins | Lib/Sdp | 405 |
Radipole1 seat · turnout 45.3%
| C. Goodson | Lib/Sdp | 606 |
| R. Dunne | Conservative | 570 |
| L. Byatt | Labour | 152 |
Tophill West1 seat · turnout 22.6%
| Y Copus | Conservative | 523 |
| J Draper | Labour | 328 |
Westham East1 seat · turnout 39.1%
| M. Jewkes | Labour | 763 |
| E. Taylor | Independent | 305 |
Westham North1 seat · turnout 43.5%
| D. Hall | Labour | 1,010 |
| A. Hyde | Conservative | 777 |
Weymouth East1 seat · turnout 48.1%
| A. Griffin | Conservative | 638 |
| S. Taylor | Lib/Sdp | 289 |
| H. Dawson | Labour | 215 |
Weymouth West1 seat · turnout 45.3%
| P. Diment | Conservative | 567 ✓ |
| R. Russell | Independent | 554 |
| R. Phelps | Labour | 460 |
| G. Hunwicks | Ecol | 99 |
Wyke Regis1 seat · turnout 46.2%
| A Sheppard | Labour | 994 |
| A. Emery | Conservative | 775 |
