Before (end of 2005) (48 seats, Elections Centre)
Conservative 31 · Labour 15 · Liberal Democrats 2 · Other 0
After (end of 2006) (48 seats, Elections Centre)
Conservative 32 · Labour 12 · Liberal Democrats 3 · Other 1
Ward results
| Jack Dean | Conservative | 1,630 ✓ |
| Jennifer Blumsom | Liberal Democrats | 286 |
| Margaret White | Labour | 111 |
Haldens1 seat
| Martyn Levitt | Conservative | 641 ✓ |
| Bhavna Joshi | Labour | 520 |
| Elizabeth Smith | Liberal Democrats | 377 |
Handside1 seat
| Nigel Quinton | Liberal Democrats | 1,127 ✓ |
| Sue Collins | Conservative | 1,103 |
| Sarah Carthew | Labour | 273 |
Hatfield Central1 seat
| Colin Croft | Labour | 521 ✓ |
| Douglas Berry | Conservative | 425 |
| Lis Meyland-Smith | Liberal Democrats | 322 |
Hatfield East1 seat
| Nicola Dorrington | Conservative | 826 ✓ |
| Constance Elliott | Labour | 357 |
| Roger Cashmore | Liberal Democrats | 324 |
| Constance Elliott | Labour | 322 |
Hatfield North1 seat
| Clare Berry | Conservative | 1,081 ✓ |
| Anthony Wilder | Labour | 535 |
| Richard Griffiths | Liberal Democrats | 345 |
Hatfield West1 seat
| Neil Atkin | Conservative | 757 ✓ |
| Dean Archer | Labour | 531 |
| Simon Archer | Liberal Democrats | 235 |
Hollybush1 seat
| Margaret Birleson | Labour | 617 ✓ |
| Stephan Battaglia | Conservative | 521 |
| Hazel Jacquemain | Liberal Democrats | 239 |
Howlands1 seat
| Warren Davies | Conservative | 821 ✓ |
| Alan Chesterman | Labour | 634 |
| Mark Knight | Green | 174 |
| Jonathan Arch | Liberal Democrats | 167 |
Northaw1 seat
| John Nicholls | Conservative | 1,455 ✓ |
| Nigel Bain | Liberal Democrats | 203 |
| Alex Breed | Labour | 111 |
Northaw & Cuffley1 seat · turnout 42.4%
| J. Nicholls | Conservative | 1,455 ✓ |
| N. Bain | Liberal Democrats | 203 |
| A. Breed | Labour | 111 |
Panshanger1 seat
| Sara Johnston | Conservative | 904 ✓ |
| William Longbottom | Labour | 409 |
| Marcel Naseby | Liberal Democrats | 279 |
Peartree1 seat
| Jacqui Russell | Labour | 453 ✓ |
| F. Marsh | Liberal Democrats | 447 |
| B Rosewall | Conservative | 341 |
Sherrards1 seat
| Christine Wheeler | Conservative | 1,100 ✓ |
| Margaret Hurst | Labour | 571 |
| M. Lotz | Liberal Democrats | 346 |
Welham Green1 seat
| Peter O'Brien | Conservative | 707 ✓ |
| Bridgit Croft | Labour | 198 |
| Sheila Archer | Liberal Democrats | 156 |
Welwyn North1 seat
| Steven Markiewicz | Conservative | 987 ✓ |
| Helen Bassett | Liberal Democrats | 241 |
| Anthony Crump | Labour | 138 |
Welwyn South2 seats
| Amanda Perkins | Conservative | 1,183 ✓ |
| Carl Storer | Conservative | 1,135 ✓ |
| John Blackburn | Liberal Democrats | 408 |
| Ian Skidmore | Liberal Democrats | 396 |
| Sue Jones | Labour | 191 |
| Sheila Wilder | Labour | 174 |