Before (end of 1983) (39 seats, Elections Centre)
Conservative 21 · Labour 12 · SDP-Liberal Alliance 6 · Other 0
After (end of 1984) (39 seats, Elections Centre)
Conservative 23 · Labour 12 · SDP-Liberal Alliance 4 · Other 0
Ward results
Aldenham West1 seat · turnout 45.9%
| A. Jefferis | Conservative | 894 |
| A. Bell | Labour | 418 |
| E. Gadsden | All | 354 |
Heath North1 seat · turnout 41.6%
| B. Batten | Conservative | 895 |
| C. Hardy | All | 533 |
| A. Sharpe | Labour | 131 |
Heath South1 seat · turnout 41.4%
| P. Riches | Conservative | 987 |
| R. Hardy | All | 461 |
| P. Evans | Labour | 102 |
Hillside1 seat · turnout 34.5%
| J. Kentish | Labour | 650 |
| A. Gattward | Conservative | 388 |
| C. Shenton | All | 151 |
Lyndhurst1 seat · turnout 41.8%
| E. Lindsey | Labour | 661 |
| I. Hirshfield | Conservative | 562 |
| L. Reefe | All | 155 |
Potters Bar Central1 seat · turnout 45.6%
| P. Spratt | Conservative | 685 |
| D. Martin | All | 573 |
| M. Grace | Labour | 168 |
Potters Bar North1 seat · turnout 38.4%
| M. Johnson | Conservative | 1,035 |
| P. Shannon | All | 294 |
| R. Page | Labour | 91 |
Potters Bar South1 seat · turnout 41.6%
| G. Ferguson | Conservative | 779 |
| R. Vessey | All | 245 |
| R. Angel | Labour | 215 |
Potters Bar West1 seat · turnout 36.6%
| M. Watts | Conservative | 780 |
| W. Ramage | All | 319 |
| J. McCarthy | Labour | 229 |
St. James East1 seat · turnout 55.1%
| L. Hodgson | All | 769 |
| A. Barton | Conservative | 642 |
| R. Clifton | Labour | 302 |
St. James West1 seat · turnout 58.2%
| A. Attwood | Conservative | 1,054 |
| R. Briggs | All | 866 |
| P Halsey | Labour | 139 |
