Before (end of 1982) (35 seats, Elections Centre)
Conservative 15 · Labour 10 · Other 10 · SDP-Liberal Alliance 0
After (end of 1983) (35 seats, Elections Centre)
Conservative 16 · Labour 12 · Other 7 · SDP-Liberal Alliance 0
Ward results
Melcombe Regis1 seat · turnout 44.9%
| J. Blackburn | Conservative | 681 |
| T. Thomas | Lib/Sdp | 609 |
| J. Palmer | Labour | 155 |
North Central1 seat · turnout 39.7%
| J. Jenner | Conservative | 745 |
| J. Robbins | Lib/Sdp | 494 |
| H. Dawson | Labour | 234 |
Preston1 seat · turnout 44.9%
| J. Litschi | Conservative | 1,262 |
| A. Neill | Lib/Sdp | 465 |
Radipole1 seat · turnout 43.4%
| P. Steane | Conservative | 582 ✓ |
| P. Bennett | Lib/Sdp | 431 |
| L. Byatt | Labour | 139 |
| J. Hayden | RES | 132 |
Tophill East1 seat · turnout 42.4%
| F. Morris | Labour | 521 |
| Y Copus | Conservative | 458 |
Tophill West1 seat · turnout 35.2%
| L. Ames | RES | 703 |
| M. Dixon | Independent | 411 |
| J Draper | Labour | 169 |
Underhill1 seat
| A. Martindale | Labour | 0 ✓ |
Westham East1 seat · turnout 44.1%
| C. Price | Labour | 859 |
| W. Rook | Conservative | 343 |
Westham North1 seat · turnout 43.6%
| A. Hutchings | Labour | 807 |
| A. Hyde | Conservative | 678 |
| P. Wicks | Lib/Sdp | 326 |
Westham West1 seat · turnout 49.1%
| R. Gainey | Labour | 811 |
| D. Randle | Conservative | 437 |
Weymouth West1 seat · turnout 47.1%
| A. Day | Conservative | 892 ✓ |
| R. Phelps | Labour | 437 |
| J. Gardner | Lib/Sdp | 227 |
| J. Taylor | RES | 179 |
Wyke Regis1 seat · turnout 49.0%
| B. Dench | Labour | 917 |
| P. Diment | Conservative | 705 |
| S. Cheeseman | Lib/Sdp | 250 |