Before (end of 2018) (58 seats, Open Council Data)
Conservative 30 · Liberal Democrats 18 · Labour 6 · Other 3 · Green 1
After (end of 2019) (58 seats, Open Council Data)
Liberal Democrats 25 · Conservative 23 · Labour 6 · Other 3 · Green 1
Ward results
Ashley1 seat · turnout 42.7%
| Iqbal Zia | Liberal Democrats | 1,411 ✓ |
| Mohammed Mortuza | Labour | 556 |
| Stephane Antoine Farenga | Green | 308 |
| Yasmin-May Harisha | Conservative | 244 |
Batchwood1 seat · turnout 41.4%
| Liz Needham | Liberal Democrats | 878 ✓ |
| Gordon Baisley | Labour | 755 |
| Alex Harisha-Clark | Conservative | 381 |
| Anne McQuade | Green | 210 |
Clarence1 seat
| Danny Clare | Liberal Democrats | 1,521 ✓ |
| Don Deepthi | Conservative | 357 |
| Catherine Michel | Green | 252 |
| Jagat Chatrath | Labour | 249 |
Colney Heath1 seat · turnout 39.6%
| Chris Brazier | Liberal Democrats | 1,022 ✓ |
| Susan Devi | Conservative | 421 |
| Andrew Osborne | Labour | 174 |
| James Ryan | Green | 157 |
Cunningham1 seat · turnout 43.2%
| Robert Donald | Liberal Democrats | 1,132 ✓ |
| Muhammad Abdur Rahim | Labour | 426 |
| Sarah Tallon | Conservative | 372 |
| Greg Blom | Green | 145 |
Harpenden East1 seat · turnout 36.4%
| Geoffrey Newman | Conservative | 658 ✓ |
| Pip Liver | Liberal Democrats | 608 |
| Anne James | Independent | 406 |
| James Nathaniel Gill | Labour | 179 |
| Angela Helen Troughton | Green | 168 |
Harpenden North1 seat · turnout 32.6%
| Bert Pawle | Conservative | 818 ✓ |
| Melanie Priggen | Liberal Democrats | 633 |
| Ian Troughton | Green | 200 |
| Emily Jane Tilly | Labour | 169 |
Harpenden South1 seat · turnout 34.4%
| Brian Ellis | Conservative | 994 ✓ |
| Zoe Galvin | Liberal Democrats | 382 |
| Rosalind Mary Paul | Green | 230 |
| George Murray Fraser | Labour | 227 |
Harpenden West1 seat · turnout 38.5%
| Roger Butterworth | Conservative | 1,122 ✓ |
| Jeffrey Kyndon Phillips | Liberal Democrats | 622 |
| Lesley Baker | Green | 311 |
| Henry Michael Ivor Meredith | Labour | 212 |
London Colney1 seat · turnout 30.5%
| Helen Pakenham | Labour | 855 ✓ |
| Liz Winstone | Conservative | 749 |
| Tony Lillico | Liberal Democrats | 403 |
| Mark Stephen Charles Park-Crowne | Green | 189 |
Marshalswick North1 seat · turnout 42.6%
| Clare Julien | Liberal Democrats | 1,223 ✓ |
| Lyn Bolton | Conservative | 549 |
| James Richard Lomas | Green | 193 |
| Alexander Veitch | Labour | 173 |
Marshalswick South1 seat · turnout 49.9%
| Karen Young | Liberal Democrats | 1,461 ✓ |
| Salih Gaygusuz | Conservative | 833 |
| Richard Harris | Labour | 225 |
| Susana Rosa Garcia-Martinez | Green | 204 |
Park Street1 seat · turnout 34.7%
| Syed Abidi | Liberal Democrats | 866 ✓ |
| Claudio Duran | Conservative | 710 |
| Sally Leonard | Green | 211 |
| Gary Christopher Chambers | Labour | 198 |
Redbourn1 seat · turnout 37.7%
| David Mitchell | Independent | 747 ✓ |
| Ed Webster | Conservative | 586 |
| Symon Vegro | Labour | 245 |
| Will Jankowski | Liberal Democrats | 234 |
Sandridge1 seat · turnout 38.4%
| Frances Leonard | Conservative | 689 ✓ |
| Sharon Claire Hollingsworth | Liberal Democrats | 394 |
| Matthew Maddock | Green | 199 |
| Jon Hegerty | Labour | 154 |
Sopwell2 seats · turnout 41.6%
| Emma Matanle | Liberal Democrats | 1,050 ✓ |
| Mandy Diana McNeil | Liberal Democrats | 1,018 ✓ |
| Iain Grant | Labour | 729 |
| Edward Harris | Labour | 720 |
| Barry Paul Sumpter | Conservative | 233 |
| Graham Leonard | Conservative | 215 |
| Lucy Swift | Green | 208 |
| Phil Fletcher | Green | 189 |
St Peters1 seat · turnout 42.2%
| William Tucker | Liberal Democrats | 1,365 ✓ |
| Alec Campbell | Conservative | 505 |
| Jill Mills | Green | 495 |
| Mark Antony Ewington | Labour | 260 |
St Stephen1 seat
| Dave Winstone | Conservative | 1,006 ✓ |
| Sinéad Keeley Howland | Liberal Democrats | 527 |
| Caroline Hall | Green | 217 |
| Janet Blackwell | Labour | 154 |
Verulam1 seat · turnout 49.5%
| Stephen Barrett | Liberal Democrats | 1,529 ✓ |
| Nicholas Paul Verity | Conservative | 865 |
| Candy Whittome | Green | 213 |
| Michael Bartlet | Labour | 153 |
Wheathampstead1 seat · turnout 39.4%
| Sandra Maureen Wood | Conservative | 851 ✓ |
| Gerard Patrick Panting | Liberal Democrats | 710 |
| Oliver Hitch | Green | 233 |
| Neill Sankey | Labour | 154 |