Before (end of 2018) (48 seats, Open Council Data)
Conservative 25 · Labour 15 · Liberal Democrats 8
After (end of 2019) (48 seats, Open Council Data)
Conservative 23 · Labour 13 · Liberal Democrats 12
Ward results
| Jonathan Boulton | Conservative | 1,253 ✓ |
| Louise Beth Noel | Liberal Democrats | 376 |
| Graham Martyn Beevers | Labour | 218 |
Haldens1 seat · turnout 32.0%
| Barbara Ann Fitzsimon | Conservative | 568 ✓ |
| Jason Robinson | Labour | 514 |
| Darrell Rodney Panter | Liberal Democrats | 341 |
| Berenice Constance Mary Dowlen | Green | 164 |
Handside1 seat · turnout 46.3%
| Anthony Dennis | Liberal Democrats | 1,488 ✓ |
| Chieme Okuzu | Conservative | 667 |
| Martin Paul Norman | Labour | 202 |
| Ian Nicholas Challoner Nendick | Green | 178 |
Hatfield Central1 seat · turnout 24.4%
| Glyn Charles Hayes | Labour | 582 ✓ |
| James Bond | Conservative | 435 |
| Adam Edwards | Liberal Democrats | 274 |
Hatfield East2 seats · turnout 34.0%
| Caron Juggins | Conservative | 623 ✓ |
| Ed Boulton | Conservative | 584 ✓ |
| Jackie Brennan | Liberal Democrats | 553 |
| Philip John Knott | Labour | 524 |
| Gemma May Louise Moore | Liberal Democrats | 467 |
| Cathy Watson | Labour | 450 |
| Ian Howard Gregory | Green | 157 |
Hatfield South West2 seats · turnout 27.1%
| Lenny Brandon | Labour | 629 ✓ |
| James Broach | Labour | 544 ✓ |
| Simon John Archer | Liberal Democrats | 370 |
| Jack Adams | Conservative | 341 |
| Wilson P.J. | Liberal Democrats | 322 |
| Aaron Jacob | Conservative | 295 |
Hatfield Villages1 seat · turnout 28.8%
| Drew Robert Richardson | Conservative | 654 ✓ |
| Margaret Anne Eames-Petersen | Labour | 573 |
| Matthew John Quenet | Liberal Democrats | 218 |
Hollybush1 seat · turnout 26.1%
| Margaret Birleson | Labour | 620 ✓ |
| Anthony James Musk | Conservative | 492 |
| Chris Corbey-West | Liberal Democrats | 183 |
Howlands1 seat · turnout 31.1%
| Jill Weston | Labour | 696 ✓ |
| Stan Tunstall | Conservative | 523 |
| Darren Hughes | UK Independence Party (UKIP) | 193 |
| Konrad Basch | Liberal Democrats | 191 |
Northaw and Cuffley1 seat · turnout 31.1%
| George Michaelides | Conservative | 1,012 ✓ |
| Robina Helen Durrant | Liberal Democrats | 335 |
| Sheila Ann Barrett | Labour | 131 |
Panshanger1 seat · turnout 36.2%
| Jane Quinton | Liberal Democrats | 784 ✓ |
| Iain Mansfield | Conservative | 587 |
| Kyle Anthony Macleod | Labour | 237 |
Peartree1 seat
| Jayne Lesley Ranshaw | Liberal Democrats | 623 ✓ |
| Steve Roberts | Labour | 402 |
| Tony Bailey | Conservative | 210 |
Sherrards1 seat · turnout 44.0%
| Frank Annibale Stefano Marchio Marsh | Liberal Democrats | 921 ✓ |
| Pat Mabbott | Conservative | 595 |
| Hilary Louise Carlen | Labour | 245 |
| Paul Joseph Naughton | UK Independence Party (UKIP) | 110 |
| Lesley Jean Smith | Green | 108 |
Welham Green and Hatfield South1 seat · turnout 30.0%
| Jaida Esin Caliskan | Liberal Democrats | 883 ✓ |
| Darren Malcolm Bennett | Conservative | 408 |
| John Richard Eames-Petersen | Labour | 297 |
Welwyn East1 seat · turnout 34.6%
| Roger Trigg | Conservative | 905 ✓ |
| Helen Natalie Harrington | Liberal Democrats | 511 |
| Joshua Murombo Chigwangwa | Labour | 343 |
Welwyn West1 seat · turnout 36.8%
| Tony Kingsbury | Conservative | 998 ✓ |
| Christina Maria Raven | Liberal Democrats | 557 |
| Tim Hogan | Green | 126 |
| Ian Merison | Labour | 116 |