Before (end of 2003) (58 seats, Elections Centre)
Liberal Democrats 23 · Conservative 21 · Labour 13 · Other 1
After (end of 2004) (58 seats, Elections Centre)
Liberal Democrats 29 · Conservative 17 · Labour 11 · Other 1
Ward results
Cunningham1 seat · turnout 45.0%
| Geoff Harrison | Liberal Democrats | 1,180 ✓ |
| James Vessey | Conservative | 542 |
| Rebecca Gumbrell-McCormick | Labour | 340 |
Harpenden North1 seat · turnout 43.0%
| John Chambers | Conservative | 1,228 ✓ |
| Christopher Canfield | Liberal Democrats | 707 |
| Ramsay Ross | Labour | 223 |
Harpenden South1 seat · turnout 44.0%
| Emma Stevenson | Conservative | 1,480 ✓ |
| Nigel Jenkinson | Liberal Democrats | 536 |
| David Lawlor | Labour | 220 |
Marshalswick North1 seat
| Jennifer Stroud | Liberal Democrats | 1,169 ✓ |
| John Palmer Foster | Conservative | 880 |
| John Baughan | Labour | 207 |
Marshalswick South1 seat · turnout 50.9%
| Melvyn Teare | Liberal Democrats | 1,193 ✓ |
| Richard Bretherton | Conservative | 1,025 |
| Sonia Smith | Labour | 313 |