| Ouse Washes (Hundred Foot Washes) Wildlife Trust For Beds Cambs & Northants;RSPB Welches Dam | 1522.16 ha | | — |
| Wicken Fen National Trust | 381.02 ha | | — |
| Burwell Fen | 100.25 ha | | — |
| Tubney Fen | 73.43 ha | | — |
| Kingfishers Bridge NR | 62.16 ha | | — |
| Anglesey Abbey (National Trust) | 53.79 ha | | — |
| Hurdle Hall | 39.79 ha | | — |
| Cam Washes SSSI | 35.02 ha | | — |
| Roswell Pits | 21.29 ha | | — |
| Turf Farm | 17.44 ha | | — |
| Turf Farm | 11.2 ha | | — |
| Reach24 | 10.04 ha | | — |
| White Fen | 9.54 ha | | — |
| Fordham Woods NR Wildlife BCN | 9.09 ha | | — |
| Ely Country Park | 5.06 ha | | — |
| Isleham Recreation Ground | 4.86 ha | | — |
| Little Downham Local Nature Reserve | 4.04 ha | | — |
| Turf Farm | 2.84 ha | | — |
| Cherry Hill | 2.75 ha | | — |
| Soham Meadow Wildlife BCN | 2.74 ha | | — |
| The Holts | 2.51 ha | | — |
| Jubilee Gardens | 1.04 ha | | — |
| Burwell House Cambridgeshire County Council | 0.99 ha | | — |
| The Winter Garden | 0.96 ha | | — |
| Lavender Green | 0.85 ha | | — |
| Woodfen Road Green | 0.68 ha | | — |
| Chippenham Village Recreation Ground Chippenham Parish Council | 0.63 ha | | — |
| Chettisham Meadow | 0.6 ha | | — |
| The Almonry Gardens | 0.42 ha | | — |
| Bishop's Garden | 0.4 ha | | — |
| Pinetum | 0.4 ha | | — |
| The Dirt Hills | 0.35 ha | | — |
| Haddenham Closed Cemetery Haddenham Parish Council and Conservation Society | 0.32 ha | | — |
| Cooper's Green | 0.28 ha | | — |
| Feast's Green | 0.24 ha | | — |
| Chippenham Childrens Play Area | 0.15 ha | | — |
| Rose Garden | 0.15 ha | | — |
| Formal Garden | 0.12 ha | | — |
| Herbaceous Garden | 0.12 ha | | — |
| Narcissus Garden | 0.12 ha | | — |
| Dahlia Garden | 0.08 ha | | — |
| Jubilee Gardens | 0.08 ha | | — |
| Fordham 2000 Memorial Garden | 0.06 ha | | — |
| New Zealand Squadron War Memorial | 0.06 ha | | — |
| Pauline's Swamp | — | | — |