Before (end of 1977) (39 seats, Elections Centre)
Conservative 25 · Labour 10 · The Liberal Party 4 · Other 0
After (end of 1978) (39 seats, Elections Centre)
Conservative 25 · Labour 10 · The Liberal Party 4 · Other 0
Ward results
ALDENHAM EAST1 seat · turnout 50.3%
| D. Nelson | Conservative | 1,426 |
| O'Donaghue | Labour | 120 |
| C. Mallach | LIB | 98 |
Brookmeadow1 seat
| P. Roach | Labour | 1,176 |
| Lockwood | Conservative | 287 |
Heath North1 seat · turnout 40.0%
| J. Harding | Conservative | 875 |
| Shone | LIB | 373 |
| Davies | Labour | 130 |
Heath South1 seat · turnout 47.1%
| Eyre | Conservative | 1,232 |
| Mitchell | LIB | 320 |
| Heminsley | Labour | 136 |
Kenilworth1 seat · turnout 49.3%
| Atkinson | Labour | 949 |
| Tattersall | Conservative | 588 |
| J. Timson | LIB | 78 |
Mill1 seat · turnout 49.7%
| Bran | LIB | 966 |
| Kirby | Conservative | 501 |
| J. Squires | Labour | 243 |
Potters Bar Central1 seat · turnout 57.4%
| I. Fielding | Conservative | 880 |
| Nelmes | LIB | 670 |
| McCarthy | Labour | 200 |
Potters Bar East1 seat · turnout 49.1%
| A. Brice | Conservative | 1,525 ✓ |
| Driver | Labour | 543 |
| King | LIB | 211 |
| Hurst | NF | 103 |
Potters Bar North1 seat · turnout 47.1%
| W. Stock | Conservative | 1,412 |
| P. Shannon | LIB | 212 |
| Ford | Labour | 114 |
Potters Bar South1 seat · turnout 51.7%
| E. Daniell | Conservative | 943 ✓ |
| B. Burness | Labour | 382 |
| Bentall | LIB | 198 |
| Fenn | NF | 61 |
St. James East2 seats · turnout 53.9%
| Scott | Conservative | 670 |
| Hillier | LIB | 641 |
| Topping | Conservative | 636 |
| Hyman | LIB | 613 |
| Wyatt | Labour | 130 |
| Sanders | Labour | 123 |
St. James West1 seat · turnout 51.1%
| L. Silver | Conservative | 1,062 |
| Eustace | LIB | 481 |
| Pountney | Labour | 170 |