| Earth Trust Earth Trust | 481.29 ha | | — |
| Aston Rowant Nature Reserve | 147.85 ha | | — |
| Shotover Country Park | 121.58 ha | | — |
| Brasenose Wood and Shotover Hill | 114.95 ha | | — |
| Warburg Nature Reserve | 111.13 ha | | — |
| Shirburn Park | 107.34 ha | | — |
| Wells Farm BBOWT | 63.12 ha | | — |
| Holton Wood | 50.75 ha | | — |
| Harcourt Arboretum University of Oxford | 50.17 ha | | — |
| Old Kiln Lakes | 42.22 ha | | — |
| Wittenham Clumps Earth Trust | 34.37 ha | | — |
| Sydlings Copse | 26.45 ha | | — |
| Chinnor Hill Nature Reserve | 26.0 ha | | — |
| Waterperry Gardens | 24.94 ha | | — |
| River of Life Earth Trust | 20.67 ha | | — |
| Cholsey Marsh | 20.24 ha | | — |
| Clifton Meadows Earth Trust | 18.17 ha | | — |
| Wallingford Castle Meadows | 16.16 ha | | — |
| Nuneham Park | 15.15 ha | | — |
| Church Farm Earth Trust | 15.01 ha | | — |
| Friar Park | 14.98 ha | | — |
| Cuttle Brook Nature Reserve | 14.38 ha | 🐕 | — |
| Mongewell Park | 11.42 ha | | — |
| Oakley Hill | 10.99 ha | | — |
| Old Arboretum | 10.13 ha | | — |
| Hartslock Berkshire Buckinghamshire Oxfordshire Wildlife Trust | 9.89 ha | | — |
| Gillotts Field https://greenerhenley.org.uk/wildlife-group/ | 9.53 ha | | — |
| Berinsfield Park | 7.72 ha | | — |
| Boundary Park | 7.56 ha | | — |
| Holton Park | 7.34 ha | | — |
| Edmonds Park | 7.05 ha | | — |
| Millennium Green | 6.37 ha | | — |
| Marsh Meadows | 5.9 ha | | — |
| Wheatley Campus Grounds | 5.7 ha | | — |
| Neptune Wood Earth Trust | 5.69 ha | | — |
| Sheepcot Recreation Ground | 5.39 ha | | — |
| Heyford Meadow Oxford Preservation Trust | 4.52 ha | | — |
| Withymead | 4.05 ha | | — |
| Riverside Park | 3.83 ha | | — |
| The Henley Wildlife Group | 3.59 ha | | — |
| Village Green | 3.5 ha | | — |
| Warren Bank | 3.49 ha | | — |
| Southern Road Recreation Ground | 3.39 ha | 🐕 | — |
| The Kine Croft | 3.28 ha | | — |
| Loyd Recreation Park | 3.0 ha | | — |
| Ewelme Watercress Beds & Local Nature Reserve | 2.6 ha | | — |
| Elms Park | 2.59 ha | 🐕 | — |
| Mill Meadows | 2.56 ha | | — |
| C. S. Lewis Community Nature Reserve Berkshire, Buckinghamshire & Oxfordshire Wildlife Trust | 2.48 ha | 🐕 | — |
| Horspath Wildlife Conservation Area | 2.09 ha | | — |
| Broad Arboretum Earth Trust | 2.01 ha | | — |
| Stubbings Land | 1.79 ha | | — |
| Queen Elizabeth Circle Recreation Area | 1.78 ha | | — |
| Ladygrove Hill | 1.77 ha | | — |
| Ishree Bagh | 1.53 ha | | — |
| Wallingford Castle Gardens | 1.36 ha | | — |
| Great Western Drive Park | 0.83 ha | | — |
| Hithercroft park | 0.83 ha | | — |
| Smallbones Recreation Ground | 0.78 ha | | — |
| Sandford Park | 0.75 ha | | — |
| The Henley Wildlife Group | 0.69 ha | | — |
| Nettlebed Common | 0.59 ha | | — |
| Woodeaton Manor House Walled Garden | 0.43 ha | | — |
| Parsler's Piece | 0.39 ha | | — |
| Peril's Copse | 0.39 ha | | — |
| Kitchen Garden | 0.36 ha | | — |
| Tara's Piece | 0.36 ha | | — |
| Fox Furlong Park | 0.35 ha | | — |
| Greenwood Park | 0.34 ha | | — |
| Marsh Recreation Ground | 0.34 ha | | — |
| Shillingford Bridge Hotel Pool Area | 0.31 ha | | — |
| Simons Land | 0.31 ha | | — |
| The Sunken Garden | 0.28 ha | | — |
| Broadway Gardens | 0.2 ha | | — |
| The Millennium Green | 0.12 ha | | — |
| Wildflower Meddow | 0.12 ha | | — |
| Pearce Memorial Gardens | 0.11 ha | | — |
| Cherry Garden | 0.1 ha | | — |
| Old School Green | 0.08 ha | | — |
| Rose Garden | 0.08 ha | | — |
| Station Park | 0.07 ha | | — |
| White Garden | 0.07 ha | | — |
| Singers Park | 0.04 ha | | — |
| Wisteria | 0.04 ha | | — |
| Red Lion Lawn | 0.02 ha | | — |
| Sensory Garden | 0.02 ha | | — |
| Do nkey Lane Community Orchard (WIP) | — | | — |
| Millbrook Estate | — | | — |
| Station Road Community Garden | — | | — |