| RSPB Brading Marshes | 361.06 ha | | — |
| Ventnor Downs National Trust | 200.61 ha | | — |
| Woodhouse Copse (ex Brocks Copse) | 21.8 ha | | — |
| RSPB Brading Marshes | 20.13 ha | | — |
| Osborne House, Garden and Grounds English Heritage | 18.44 ha | | — |
| Westover Park | 18.28 ha | | — |
| Alverstone Mead Nature Reserve Wight Nature Fund | 17.59 ha | | — |
| HIWWT Arreton Down Hampshire & isle of Wight Wildlife Trust | 16.68 ha | | — |
| Wydcombe Park | 14.97 ha | | — |
| HIWWT Sandown Meadows Hampshire & Isle of Wight Wildlife Trust | 13.23 ha | | — |
| Dodnor Creek Local Nature Reserve Gift To Nature | 12.08 ha | | — |
| Seaclose Park | 11.09 ha | | — |
| HIWWT Knighton Down Hampshire & Isle of Wight Wildlife Trust | 10.31 ha | | — |
| Pig Leg Lane Nature Reserve Gift To Nature | 9.5 ha | | — |
| Northwood Park | 9.4 ha | | — |
| Woodlands Vale | 9.31 ha | | — |
| Newchurch Moors Nature Reserve Hampshire and Isle of Wight Wildlife Trust | 8.74 ha | 🐕 | — |
| Eaglehead & Bloodstone Copses Nature Reserve Hampshire & Isle of Wight Wildlife Trust | 8.55 ha | | — |
| St. Cecilia's Abbey Grounds | 7.95 ha | | — |
| Ventnor Botanic Garden Ventnor Botanic Garden CIC | 6.88 ha | | — |
| Farringford House Gardens | 6.31 ha | | — |
| Lakeside Hotel Grounds | 5.98 ha | | — |
| Los Altos Park | 5.76 ha | | — |
| Big Meade | 4.62 ha | | — |
| Gatcombe Park | 4.44 ha | | — |
| Northwood Recreation Ground | 4.37 ha | | — |
| Puckpool Park IW Council | 4.28 ha | | — |
| Haddon's Pits (NT) National Trust | 4.15 ha | | — |
| Appuldurcombe House Garden | 3.88 ha | | — |
| Nansen Hill Gift To Nature | 3.85 ha | | — |
| Medina Arboretum | 3.83 ha | | — |
| Dodpits House | 3.72 ha | | — |
| Victoria Recreation Ground | 3.71 ha | | — |
| Stroud Recreation Gound | 3.67 ha | | — |
| Sandham Gardens | 3.37 ha | | — |
| Naturezones | 3.26 ha | | — |
| Ventnor Park | 3.23 ha | | — |
| Pidford Manor | 3.14 ha | | — |
| Nunwell House and Garden | 2.6 ha | | — |
| Kingston Manor | 2.58 ha | | — |
| Chawton Field Nature Reserve (No Public Access) | 2.45 ha | | — |
| Rylstone Gardens | 2.26 ha | | — |
| Downside Recreation Ground | 2.24 ha | | — |
| Mottistone Gardens National Trust | 2.21 ha | | — |
| Brighstone Recreation Ground | 2.15 ha | | — |
| Calbourne Village Green | 2.07 ha | | — |
| Sheat Manor | 2.03 ha | | — |
| Lake Cliff Gardens | 1.88 ha | | — |
| Fernhill Gardens | 1.83 ha | | — |
| Colwell Common | 1.74 ha | | — |
| Medina Riverside Park Gift To Nature | 1.74 ha | | — |
| Pan Country Park Gift To Nature | 1.72 ha | | — |
| Carisbrooke Priory Grounds | 1.61 ha | | — |
| Strathwell Park | 1.33 ha | | — |
| Battery Gardens | 1.3 ha | | — |
| Bagwich | 1.24 ha | | — |
| Far East Collection | 1.12 ha | | — |
| Litten Park | 1.12 ha | 🛝 | — |
| Harry Bright Wellow (Millennium Green) | 0.88 ha | | — |
| Tower Cottage Gardens | 0.85 ha | | — |
| Hale Manor | 0.84 ha | | — |
| Black Hut Green | 0.76 ha | | — |
| Mediterranean Garden | 0.65 ha | | — |
| Gotten Manor | 0.63 ha | | — |
| Vegetable Garden | 0.62 ha | | — |
| Mill Cottage | 0.6 ha | | — |
| Verbum Dei Catholic Retreat Centre | 0.6 ha | | — |
| Ferncliff Gardens | 0.48 ha | | — |
| Australian Garden | 0.47 ha | | — |
| Prince's Green | 0.46 ha | | — |
| Sophie Watson's Gardens | 0.45 ha | | — |
| Grove Walled Garden | 0.39 ha | | — |
| Walled Nursery Garden | 0.39 ha | | — |
| Nunwell Walled Garden | 0.38 ha | | — |
| Barton Lodges | 0.28 ha | | — |
| Keats Green | 0.28 ha | | — |
| Marie Curie Field of Dreams | 0.25 ha | | — |
| Gardens (Old Graveyard) | 0.24 ha | | — |
| Long Border | 0.24 ha | | — |
| New Zealand Garden | 0.24 ha | | — |
| Palm Garden | 0.23 ha | | — |
| Eastridge | 0.19 ha | | — |
| The Americas | 0.19 ha | | — |
| Esplanade Park | 0.18 ha | | — |
| Hydrangea Dell | 0.18 ha | | — |
| Griffin Maze | 0.17 ha | | — |
| Vernon Square Garden | 0.15 ha | | — |
| South African Terrace | 0.14 ha | | — |
| Princess Beatrice Garden | 0.12 ha | | — |
| The Terrace | 0.11 ha | | — |
| Arctic Park | 0.1 ha | | — |
| Cascade Gardens | 0.1 ha | | — |
| Rocket garden | 0.09 ha | | — |
| Memorial Garden | 0.08 ha | | — |
| Spring Hill Gardens | 0.08 ha | | — |
| Medicinal Garden | 0.07 ha | | — |
| Western Gardens | 0.05 ha | | — |
| Thearl's Garden | 0.03 ha | | — |
| Tudor Garden | 0.03 ha | | — |
| Afton Down | — | | — |
| Alan Hersey Nature Reserve | — | | — |
| Bird Sanctuary | — | | — |
| Cadets Walk Community Garden | — | | — |
| Peace Garden | — | | — |
| The Green | — | | — |