Before (end of 1978) (54 seats, Elections Centre)
Conservative 36 · Other 12 · The Liberal Party 4 · Labour 2
After (end of 1979) (53 seats, Elections Centre)
Conservative 36 · Other 12 · The Liberal Party 4 · Labour 1
Ward results
Ash Cum Ridley2 seats · turnout 82.4%
| J. Cooley | Conservative | 1,188 ✓ |
| R. Hill | Conservative | 1,094 ✓ |
| P. Little | Labour | 856 |
| D. Whiteree | Other | 802 |
| R. Wilson | Labour | 727 |
| J. Smale | Other | 597 |
Eynsford1 seat · turnout 81.6%
| E. Syddique | LIB | 651 |
| E. Worsdell | Conservative | 403 |
Kemsing2 seats
| D. Dew | Conservative | 0 ✓ |
| G. Croughton | Independent | 0 ✓ |
Sevenoaks Northern2 seats · turnout 64.4%
| D. Peirce | LIB | 1,193 |
| J. Gorton | LIB | 995 |
| A Gosson | Conservative | 922 |
| J. Dolling | Labour | 403 |
| M. Ross | Labour | 346 |
Sevenoaks Town & St. Johns3 seats · turnout 65.1%
| A. Garner | Conservative | 2,240 |
| F. Portsmore | Conservative | 2,224 |
| M. Judge | Conservative | 1,991 |
| S. Baker | Independent | 931 |
| W. Dolling | Labour | 506 |
| L. Beales | Labour | 504 |
| N. Harrild | Labour | 483 |
Westerham & Crockham Hill2 seats · turnout 71.4%
| J. Warde | Conservative | 1,688 |
| E. Dance | Conservative | 1,603 |
| R. Gooding | Labour | 767 |
| R Palmer | Labour | 764 |