| St David's Airfield | 122.94 ha | | — |
| Teifi Marshes Nature Reserve The Wildlife Trust | 91.8 ha | | — |
| Tŷ Canol National Nature Reserve | 70.09 ha | | — |
| Pencelli Forest National Nature Reserve | 65.94 ha | | — |
| Haverfordwest Racecourse | 33.43 ha | | — |
| Scolton Manor Park | 26.42 ha | | — |
| Cemaes Head Nature Reserve The Wildlife Trust of South and West Wales | 20.61 ha | | — |
| Llangloffan Fen National Nature Reserve Wildlife Trust of South and West Wales | 16.39 ha | | — |
| Folly Farm Country Gardens | 15.45 ha | | — |
| Colby Woodland Garden National Trust | 14.79 ha | | — |
| Jubilee Park and Nature Trail | 6.89 ha | | — |
| Pembroke Dock Memorial Park | 3.22 ha | | — |
| Narberth Moor | 3.1 ha | | — |
| The Rath Green | 2.47 ha | | — |
| Stackpole Walled Garden Stackpole Walled Gardens | 2.18 ha | | — |
| Lota Park | 1.93 ha | | — |
| Clunderwen Park | 1.57 ha | | — |
| Castle Hill | 1.08 ha | | — |
| Walled Garden | 0.92 ha | | — |
| Rifleman Field | 0.78 ha | | — |
| Charlton Place Park | 0.69 ha | | — |
| Spittal Village Park | 0.68 ha | | — |
| Memorial Gardens | 0.52 ha | | — |
| Alexandra Gardens | 0.51 ha | | — |
| Rosebush Park | 0.46 ha | | — |
| Albion Park | 0.32 ha | | — |
| The Green | 0.3 ha | | — |
| Colby Walled Garden National Trust | 0.23 ha | | — |
| Nicky's Field Dyffryn Fernant Garden | 0.15 ha | | — |
| Penally Village Green | 0.14 ha | | — |
| Battery Gardens | 0.13 ha | | — |
| Jubilee Park | 0.13 ha | | — |
| Pwllcrochan Pond and Marshland | 0.08 ha | | — |
| Esplanade Gardens | 0.07 ha | | — |
| Dewi's Acre Community Garden | 0.06 ha | | — |
| Gilroy Phillips Gardens | 0.06 ha | | — |
| Harbour Gardens | 0.06 ha | | — |
| Atlantic Hotel Gardens | 0.05 ha | | — |
| Dragon Inn | 0.05 ha | | — |
| Magic Garden Dyffryn Fernant Garden | 0.05 ha | | — |
| Memorial Gardens | 0.05 ha | | — |
| Millennium Garden | 0.05 ha | | — |
| Castle Gardens | 0.04 ha | | — |
| St Mary's Garden of Remembrance | 0.04 ha | | — |
| Herb Garden St Dogmaels Community Council | 0.02 ha | | — |
| The Front Garden Dyffryn Fernant Garden | 0.01 ha | | — |
| Daisybus Gardens of Wellbeing | — | | — |