| Ditchling Common Country Park | 74.65 ha | | — |
| Firle Park | 74.02 ha | | — |
| Lewes Downs (Mount Caburn) Nature Reserve | 57.58 ha | | — |
| Ouse Valley | 47.81 ha | | — |
| Malling Down Nature Reserve | 43.15 ha | | — |
| Riverside Park | 25.27 ha | | — |
| Centenary Park | 14.83 ha | | — |
| Stoneywish Nature Reserve | 14.08 ha | | — |
| Reedens Meadows | 11.81 ha | | — |
| Lewes Railway Land Local Nature Reserve | 10.55 ha | | — |
| Castle Hill Local Nature Reserve | 10.52 ha | | — |
| Chatsworth Park | 7.19 ha | | — |
| Chalvington Field | 3.28 ha | | — |
| Fort Road Recreational Ground | 2.96 ha | | — |
| Landport Recreation Ground | 2.61 ha | | — |
| Homewoodgate Farm | 2.34 ha | | — |
| The Hollow | 2.22 ha | | — |
| Howard Park | 1.92 ha | | — |
| The Oval | 1.83 ha | | — |
| Drove Park | 1.82 ha | | — |
| Southover Grange Gardens | 1.8 ha | | — |
| Meridian Park | 1.08 ha | | — |
| Bell Lane Recreational Ground | 1.06 ha | | — |
| Valley Ponds | 1.01 ha | | — |
| Finger post field | 0.93 ha | | — |
| Wild About Barcombe | 0.84 ha | | — |
| Monk's House | 0.67 ha | | — |
| The Union | 0.62 ha | 🐕 | — |
| Nevill Green | 0.58 ha | | — |
| Eridge Green | 0.55 ha | | — |
| Newhaven Memorial Garden | 0.08 ha | | — |
| Beach Garden Seaford Town Council | 0.04 ha | | — |
| Seaford Peace Garden | 0.04 ha | | — |
| Village Orchard | 0.03 ha | | — |
| Jubilee Garden Seaford Town Council | 0.02 ha | | — |
| Priory Herb Garden | 0.01 ha | | — |
| Crouch Gardens | — | | — |
| The Dell | — | | — |