| Great Fen Wildlife Trust for Bedfordshire, Cambridgeshire and Northamptonshire | 3771.13 ha | | — |
| Ouse Fen Nature Reserve RSPB | 307.6 ha | | — |
| Holme Fen National Nature Reserve | 273.53 ha | | — |
| Woodwalton Fen National Nature Reserve Natural England | 205.88 ha | | — |
| Monks Wood NNR | 164.49 ha | | — |
| Paxton Pits | 160.29 ha | | — |
| Brampton Wood | 133.99 ha | | — |
| Hinchingbrooke Country Park | 96.17 ha | | — |
| Portholme | 89.96 ha | | — |
| Ouse Fen Nature Reserve RSPB | 62.83 ha | | — |
| New Decoy | 54.1 ha | | — |
| Godmanchester NR | 50.88 ha | | — |
| Waresley Park | 47.19 ha | | — |
| Lammas Meadow | 37.35 ha | | — |
| Riverside Park | 33.09 ha | | — |
| Priory Park | 32.09 ha | | — |
| Somersham Pocket Park | 29.04 ha | 🐕 | — |
| Diddington Park | 23.02 ha | | — |
| Barford Road Pocket Park | 15.5 ha | | — |
| Somersham Local Nature Reserve | 12.52 ha | | — |
| Houghton Meadows Nature Reserve | 9.46 ha | | — |
| Riverside Park | 9.35 ha | | — |
| Upwood Meadows NNR Wildlife Trust BCN | 9.08 ha | | — |
| Berman Park Huntingdonshire District Council | 8.18 ha | | — |
| The Thicket Huntingdonshire District Council | 7.99 ha | | — |
| Bromholme Field | 7.78 ha | | — |
| Riverside Park | 7.55 ha | | — |
| Mander Park Anglian Water | 7.5 ha | | — |
| Huntingdon Cemetery & Crematorium Kier | 7.2 ha | | — |
| Stukeley Meadows Linear Nature Reserve | 6.29 ha | | — |
| Sewell's Field Hinchingbrook Country Park | 5.87 ha | | — |
| Spring Common | 5.39 ha | | — |
| Ramsey Heights Nature Reserve Great Fen | 5.35 ha | | — |
| St. Judiths Field | 4.22 ha | | — |
| Boundary Park | 3.82 ha | | — |
| Coneygear Park | 3.7 ha | | — |
| Brown's Meadow | 3.66 ha | | — |
| Ramsey 1940's Camp | 3.21 ha | | — |
| Godmanchester Recreation Ground | 2.8 ha | | — |
| King George's Field | 2.72 ha | | — |
| Judith's Field Godmanchester Town Council | 2.65 ha | | — |
| Ramsey Heights Village Green Space | 2.36 ha | | — |
| Warners Park | 2.26 ha | | — |
| Wrights Farm | 1.86 ha | | — |
| Castle Hills | 1.85 ha | | — |
| Holt Island Nature Reserve Huntingdonshire District Council | 1.72 ha | | — |
| Vicarage Farm | 1.69 ha | | — |
| Pingle Cutting Wildlife Trusts BCN | 1.4 ha | | — |
| Queen Elizabeth II Park | 1.38 ha | | — |
| Shepherds Close | 1.35 ha | | — |
| Godley Green Play Area | 1.2 ha | | — |
| Bloomfield Park | 1.19 ha | | — |
| Devana Park Godmanchester Town Council | 1.12 ha | | — |
| Buttermel Meadow Godmanchester Town Council | 1.06 ha | | — |
| Cardinal Park | 1.04 ha | | — |
| Stokes Drive Play Area David Wilson Homes/Godmanchester Town Council | 0.15 ha | | — |
| Nursery Road Play Ground Huntingdon District Council | 0.12 ha | | — |
| Ramsey Quiet Garden | 0.02 ha | | — |
| Mill Steps Godmanchester in Bloom | 0.01 ha | | — |
| Planned Godmanchester Country park | — | | — |