| Tring Park Woodland Trust | 111.12 ha | | — |
| Pendley Manor Hotel Pendley Manor Hotel | 51.09 ha | | — |
| Champneys | 45.72 ha | | — |
| Bunkers Field | 35.53 ha | | — |
| Sheethanger Common | 22.68 ha | | — |
| Warners End Valley | 22.42 ha | | — |
| Gadebridge Park | 21.84 ha | | — |
| Grovehill Playing Fields | 18.28 ha | | — |
| Gadebridge Park | 13.48 ha | | — |
| Keen Fields | 12.11 ha | | — |
| Margaret Lloyd Park | 8.5 ha | | — |
| Howe Grove Wood | 8.49 ha | | — |
| Belswains Playing Field | 7.71 ha | | — |
| Station Moor | 5.94 ha | | — |
| Blackbirds Moor | 5.91 ha | | — |
| Northridge Park | 5.18 ha | | — |
| Tring Park Cricket Club | 4.8 ha | | — |
| Canal Fields park | 3.86 ha | | — |
| Velvet Lawn | 3.85 ha | | — |
| Fishery Moor | 3.48 ha | | — |
| Bovingdon Green | 3.24 ha | | — |
| Reith Fields | 3.24 ha | | — |
| Heath Park | 3.09 ha | | — |
| Pound Meadow Playing Field | 2.59 ha | | — |
| Water Gardens | 2.55 ha | | — |
| Randall Park | 2.52 ha | | — |
| Further Roughdown Common SSSI Bowmoor Trust | 2.48 ha | | — |
| Westwick Field | 1.93 ha | | — |
| Spider Park | 1.89 ha | | — |
| Plough Gardens | 1.65 ha | | — |
| Butts Meadow | 1.47 ha | | — |
| Durrants Hill Park | 1.35 ha | | — |
| Millhoppers Pasture Butterfly Conservation | 1.34 ha | | — |
| Millhoppers Pasture Butterfly Conservation | 1.34 ha | | — |
| Balderson's Moor | 1.2 ha | | — |
| The Charter Gardens Dacorum Borough Council | 0.19 ha | | — |
| The Forget-Me-Not Memorial Garden West Hertfordshire and Buckinghamshire Sands | 0.03 ha | | — |