| Howlands Marsh | 57.11 ha | | — |
| Martin's Farm Country Park | 35.62 ha | | — |
| Skipper's Island | 34.8 ha | | — |
| Weeleyhall Wood Essex Wildlife Trust | 30.7 ha | | — |
| Cockaynes Wood Nature Reserve Cockaynes Wood Trust;Essex Wildlife Trust | 21.79 ha | | — |
| Tudor Fields | 21.69 ha | | — |
| Wrabness Nature Reserve | 21.39 ha | | — |
| Great Holland Pits Nature Reserve Essex Wildlife Trust | 17.19 ha | | — |
| Brook Country Park | 13.5 ha | | — |
| Holland Haven Country Park | 10.96 ha | | — |
| Holland Haven Country Park | 10.36 ha | | — |
| Frinton Park Playing Fields | 7.04 ha | 🐕 | — |
| Burrsville Park Meadows | 5.14 ha | | — |
| John Weston Nature Reserve | 3.72 ha | | — |
| Cliff Park | 3.29 ha | | — |
| Pickers Ditch Meadows | 2.17 ha | | — |
| Lower Park Playing Field Brightlingsea Town Council | 2.01 ha | | — |
| Crossways Park | 1.9 ha | | — |
| Carisbrooke Avenue Playing Fields | 1.79 ha | | — |
| Pickers Ditch Public Open Space | 1.59 ha | | — |
| Green Island Gardens | 1.36 ha | | — |
| Ardleigh (Millennium Green) | 1.02 ha | | — |
| Oakley Coronation Park | 0.94 ha | | — |
| Cranleigh Close Open Space Tendring District Council | 0.74 ha | | — |
| Bobbits Hole | 0.62 ha | | — |
| Mayor's Garden | 0.52 ha | | — |
| Ipswich Road Paddock | 0.37 ha | | — |
| War Memorial Park | 0.35 ha | | — |
| Springmead Gardens | 0.3 ha | | — |
| Haven Gardens | 0.29 ha | | — |
| Halstead Road Play Area | 0.27 ha | | — |
| The Rose Garden | 0.14 ha | | — |
| Witton Wood Spinney | 0.13 ha | | — |
| Garden of Remembrance | 0.12 ha | | — |
| 1920s Garden | 0.11 ha | | — |
| Cox's Pond | 0.11 ha | | — |
| Sensory Garden | 0.09 ha | | — |
| Castle Inn and Camping Site | 0.08 ha | 🚻 | — |
| Mediterranean Garden | 0.08 ha | | — |
| Peace Garden | 0.04 ha | | — |
| Weeleyhall Wood Essex Wildlife Trust | 0.02 ha | | — |
| Flood Memorial Garden | 0.01 ha | | — |
| Jaywick Memorial Garden | 0.01 ha | | — |