Before (end of 1985) (39 seats, Elections Centre)
Conservative 23 · Labour 12 · SDP-Liberal Alliance 4 · Other 0
After (end of 1986) (39 seats, Elections Centre)
Conservative 22 · Labour 12 · SDP-Liberal Alliance 5 · Other 0
Ward results
ALDENHAM EAST1 seat · turnout 55.3%
| A. Gattward | Conservative | 1,217 |
| A. Burke | Alliance For Local Living (ALL) | 533 |
| A. Page | Labour | 190 |
Brookmeadow1 seat · turnout 44.0%
| P. Roach | Labour | 998 |
| N. Gorman | Conservative | 199 |
| J. Reefe | Alliance For Local Living (ALL) | 137 |
ELSTREE1 seat · turnout 46.0%
| C. Watts | Conservative | 1,062 |
| T. Palmer | Alliance For Local Living (ALL) | 474 |
| L. Selhi | Labour | 307 |
Heath North1 seat · turnout 47.7%
| J. Harding | Conservative | 885 |
| L. Reefe | Alliance For Local Living (ALL) | 718 |
| E. Kelly | Labour | 190 |
Heath South1 seat · turnout 41.3%
| R. Gealy | Conservative | 947 |
| R. Martins | Alliance For Local Living (ALL) | 453 |
| H. Bearfield | Labour | 142 |
Kenilworth1 seat · turnout 47.2%
| A. Walton | Labour | 856 |
| A. Rozansky | Conservative | 313 |
| J. Timson | Alliance For Local Living (ALL) | 290 |
Mill1 seat · turnout 49.2%
| C. Mallach | Alliance For Local Living (ALL) | 983 |
| J. Stainton | Conservative | 456 |
| D. Hoeksma | Labour | 263 |
Potters Bar Central1 seat · turnout 51.5%
| I. Fielding | Conservative | 738 |
| D. Martin | Alliance For Local Living (ALL) | 558 |
| P. Matthews | Labour | 318 |
Potters Bar East1 seat · turnout 43.3%
| H. Spratt | Conservative | 1,063 |
| O. Dow | Alliance For Local Living (ALL) | 504 |
| H. Caylor | Labour | 492 |
Potters Bar North1 seat · turnout 45.3%
| M. Byrne | Conservative | 1,085 |
| N. Frostick | Alliance For Local Living (ALL) | 427 |
| N. Bradbury | Labour | 133 |
Potters Bar South1 seat · turnout 50.0%
| E. Daniell | Conservative | 746 |
| P. Bradbury | Labour | 322 |
| S. Hughes | Alliance For Local Living (ALL) | 302 |
St. James East1 seat · turnout 51.3%
| E. Gadsden | Alliance For Local Living (ALL) | 845 |
| J. McKenzie | Conservative | 467 |
| D. Bearfield | Labour | 280 |
St. James West1 seat · turnout 61.0%
| M. Colne | Alliance For Local Living (ALL) | 991 |
| L. Silver | Conservative | 973 |
| P Halsey | Labour | 178 |
