| Hatfield Park | 279.95 ha | | — |
| Ellenbrook Fields | 167.51 ha | | — |
| Symondshyde Great Wood | 126.46 ha | | — |
| Northaw Great Wood Country Park Welwyn Hatfield Borough Council | 122.56 ha | | — |
| Stanborough Park Finesse Leisure | 56.2 ha | | — |
| Fir and Pond Woods | 29.18 ha | | — |
| Potters Chase Wood | 26.81 ha | | — |
| Moneyhole Lane Playing Fields Finesse Leisure | 17.1 ha | | — |
| Black Fan Valley | 10.37 ha | | — |
| Howe Dell | 5.93 ha | | — |
| Woodland Garden | 5.86 ha | | — |
| The Campus Parkway | 5.31 ha | | — |
| Digswell Lake Nature Reserve | 5.18 ha | | — |
| Haldens Park | 5.08 ha | | — |
| Roe Hill Park | 4.88 ha | | — |
| Redhall Park | 4.78 ha | | — |
| Lemsford Springs | 4.61 ha | | — |
| Millwards Park | 4.53 ha | | — |
| The Vineyard | 2.79 ha | | — |
| Angerland Common | 2.77 ha | | — |
| Campus Accommodation Green | 1.2 ha | | — |
| St Albans Road East Recreational Ground Hatfield Town Council | 1.12 ha | | — |
| Burnham Green | 1.0 ha | | — |
| Acacia Street Recreation Area | 0.88 ha | | — |
| Little Rivers | 0.86 ha | | — |
| Steam Woods | 0.6 ha | | — |
| West Garden | 0.52 ha | | — |
| East Garden | 0.42 ha | | — |
| Danesbury Fernery | 0.4 ha | | — |
| Old Palace Garden | 0.35 ha | | — |
| Sundial Garden | 0.24 ha | | — |
| Coronation Gardens Hatfield Town Council | 0.17 ha | | — |
| Picnic Area | 0.14 ha | | — |
| Dakota House Park | 0.08 ha | | — |
| Node Way Gardens Community Green | 0.05 ha | | — |
| Millenium Garden | 0.01 ha | | — |