Before (end of 2009) (58 seats, Elections Centre)
Liberal Democrats 30 · Conservative 22 · Labour 5 · Other 1
After (end of 2010) (58 seats, Elections Centre)
Liberal Democrats 30 · Conservative 24 · Labour 3 · Other 1
Ward results
Harpenden East1 seat
| R Dean | Conservative | 1,949 ✓ |
| A Steer | Liberal Democrats | 1,740 |
| Ronald Lane | Labour | 282 |
| T Blackwell | Green | 123 |
Harpenden North1 seat · turnout 76.0%
| Geoff Turner | Conservative | 2,200 ✓ |
| Gordon Burrow | Liberal Democrats | 1,205 |
| Ramsay Ross | Labour | 430 |
| Alex Tate | Green | 168 |
Harpenden South1 seat · turnout 78.0%
| Teresa Heritage | Conservative | 2,747 ✓ |
| Paul Spinks | Liberal Democrats | 927 |
| Linda Ann Spiri | Labour | 346 |
| Tony Grover | Green | 189 |
Marshalswick North1 seat
| Thomas Clegg | Liberal Democrats | 1,827 ✓ |
| John Palmer Foster | Conservative | 1,479 |
| Ruairi McCourt | Labour | 372 |
| Rosalind Mary Paul | Green | 142 |
Marshalswick South1 seat
| Rod Perks | Liberal Democrats | 1,706 ✓ |
| Salih Gaygusuz | Conservative | 1,676 |
| Anthony Nicholson | Labour | 596 |
| Jill Mills | Green | 247 |
Sandridge1 seat
| Beric Read | Conservative | 1,560 ✓ |
| Helen Bishop | Liberal Democrats | 956 |
| Richard Harris | Labour | 332 |
| Ian Troughton | Green | 137 |