Before (end of 1985) (35 seats, Elections Centre)
Conservative 17 · Labour 12 · Other 5 · SDP-Liberal Alliance 1
After (end of 1986) (35 seats, Elections Centre)
Labour 14 · Conservative 13 · Other 5 · SDP-Liberal Alliance 3
Ward results
Melcombe Regis1 seat · turnout 35.7%
| O. Carroll | Conservative | 675 |
| M. Henville | Lib/Sdp | 381 |
| I. Cleave | Labour | 173 |
North Central1 seat · turnout 41.5%
| A. Chedzoy | Labour | 1,004 |
| P. Harvey | Conservative | 825 |
Tophill East1 seat · turnout 36.0%
| H. Booth | Independent | 737 |
| P. Saunders | Labour | 113 |
Tophill West1 seat · turnout 26.1%
| M. Leicester | Independent | 342 |
| J. Draper | Lib/Sdp | 340 |
| P. Butcher | RES | 331 |
Underhill1 seat · turnout 33.3%
| P. Kimber | Labour | 514 |
| Z. Hartland | Lib/Sdp | 316 |
Westham North1 seat · turnout 27.3%
| V. McCarthy | Labour | 904 |
| E. Lucas | Green | 214 |
Westham West1 seat · turnout 42.0%
| P. Randall | Labour | 646 |
| J. Hammleburg | Conservative | 325 |
| G. Hunwicks | Green | 92 |
Weymouth East1 seat · turnout 45.2%
| E. Webb | Conservative | 765 |
| M Frost | Labour | 247 |
| A. Wilson | Green | 84 |
Weymouth West1 seat · turnout 39.8%
| R. Weaver | Independent | 917 |
| M. Porter | Labour | 559 |
Wyke Regis1 seat · turnout 46.5%
| B. Clark | Labour | 828 |
| A. Emery | Conservative | 708 |
| L. Webb | Lib/Sdp | 267 |
