Before (end of 2009) (48 seats, Elections Centre)
Conservative 38 · Labour 7 · Liberal Democrats 3 · Other 0
After (end of 2010) (48 seats, Elections Centre)
Conservative 40 · Labour 5 · Liberal Democrats 3 · Other 0
Ward results
| Julian Dean | Conservative | 2,717 ✓ |
| Jennifer Blumsom | Liberal Democrats | 547 |
| Donald Mahon | Labour | 249 |
Haldens1 seat
| Martyn John Levitt | Conservative | 1,525 ✓ |
| Mbizo Mpufo | Labour | 806 |
| Shirley Shaw | Liberal Democrats | 745 |
| Berenice Constance Mary Dowlen | Green | 174 |
Handside1 seat
| Tony Skottowe | Liberal Democrats | 1,824 ✓ |
| Chris Cory | Conservative | 1,812 |
| John Pomroy | Labour | 433 |
Hatfield Central1 seat
| Bukky Olawoyin | Conservative | 988 ✓ |
| Colin George Croft | Labour | 965 |
| Hazel Marion Laming | Liberal Democrats | 784 |
Hatfield East1 seat
| Tony Kingsbury | Conservative | 1,692 ✓ |
| Lis Meyland-Smith | Liberal Democrats | 783 |
| Margaret White | Labour | 741 |
Hatfield South1 seat
| Linda Elizabeth Mendez | Labour | 817 ✓ |
| David Barnaby John Hughes | Conservative | 767 |
| Sheila Archer | Liberal Democrats | 460 |
Hatfield Villages2 seats
| Howard Morgan | Conservative | 1,143 ✓ |
| Lynne Michele Sparks | Conservative | 1,107 ✓ |
| Bridgit Croft | Labour | 609 |
| Bobby Bridgeman | Liberal Democrats | 568 |
| Michael Granville Rich | Liberal Democrats | 552 |
| Brian Wilson | Labour | 166 |
Hatfield West1 seat
| Caron Juggins | Conservative | 1,703 ✓ |
| Cathy Watson | Labour | 1,071 |
| James Finlay | Liberal Democrats | 807 |
Hollybush1 seat
| Nick Pace | Conservative | 1,566 ✓ |
| Margaret Birleson | Labour | 1,108 |
| Ewan Armstrong-Bridges | Liberal Democrats | 643 |
Howlands1 seat
| George Michaelides | Conservative | 1,132 ✓ |
| Alan Chesterman | Labour | 783 |
| Lynda Cowan | Liberal Democrats | 719 |
| Jill Weston | Green | 489 |
Northaw & Cuffley2 seats
| J. Nicholls | Conservative | 2,418 ✓ |
| A Prest | Conservative | 1,798 ✓ |
| N. Bain | Liberal Democrats | 582 |
| M. Fuller | BNP | 222 |
Panshanger1 seat
| Roger Trigg | Conservative | 1,734 ✓ |
| Frank Annibale Stefano Marchio Marsh | Liberal Democrats | 896 |
| Zacha Hennessey | Labour | 619 |
| Adrian Toole | Green | 122 |
Peartree1 seat
| Daniel Cox | Conservative | 1,185 ✓ |
| Caroline Duke | Liberal Democrats | 1,060 |
| Steve Roberts | Labour | 793 |
Sherrards1 seat
| Jonathan Beckermann | Conservative | 1,728 ✓ |
| Tony Crump | Labour | 786 |
| Jonathan Arch | Liberal Democrats | 625 |
| Susan Groom | Green | 214 |
Welham Green1 seat
| Keith John Pieri | Conservative | 1,285 ✓ |
| Simon John Archer | Liberal Democrats | 393 |
| Diana Lesley Bell | Labour | 296 |
Welwyn East1 seat
| Steven Markiewicz | Conservative | 2,538 ✓ |
| Ian Skidmore | Liberal Democrats | 687 |
| P. Heyman | Labour | 365 |
| Matthew Knight | Green | 161 |