| RSPB Blacktoft Sands | 186.88 ha | | — |
| Dalton Park | 131.79 ha | | — |
| Flamborough Outer Headland LNR | 77.59 ha | | — |
| Danes Dyke LNR | 61.88 ha | | — |
| RSPB Bempton Cliffs | 59.31 ha | | — |
| North Cave Wetlands Yorkshire Wildlife Trust | 56.69 ha | | — |
| Sandhall Park | 52.55 ha | | — |
| Hodgson's Fields Yorkshire Wildlife Trust | 45.28 ha | 🐕 | — |
| Skipsea Bail Mere | 43.87 ha | | — |
| Bishop Wilton Deep Dale SSSI | 43.72 ha | | — |
| Saltmarshe Park | 43.4 ha | | — |
| Tophill Low SSSI | 34.61 ha | | — |
| North Cliffe Woods Yorkshire Wildlife Trust | 34.53 ha | | — |
| Skerne Wetlands Yorkshire Wildlife Trust | 34.45 ha | | — |
| YWT Kilnsea Wetlands Yorkshire Wildlife Trust | 28.04 ha | | — |
| Adlingfleet Common | 26.89 ha | | — |
| Millington Wood LNR | 21.94 ha | | — |
| Humber Bridge Country Park | 18.12 ha | | — |
| Hudson Way LNR | 17.74 ha | | — |
| YWT Pulfin Bog | 17.53 ha | | — |
| Watersedge Park | 16.43 ha | | — |
| Brantingham Dale SSSI | 16.4 ha | | — |
| South Landing, Flamborough LNR | 14.95 ha | | — |
| Beverley Parks LNR | 14.12 ha | | — |
| The Park | 13.97 ha | | — |
| West Park Goole Town Council | 12.87 ha | | — |
| Loglands Nature Reserve | 11.5 ha | | — |
| Hollym Carrs Nature Reserve South Holderness Countryside Society | 11.2 ha | | — |
| Cali Heath Yorkshire Wildlife Trust | 11.18 ha | | — |
| The Park | 10.03 ha | | — |
| Kelsey Hill Gravel Pits | 9.94 ha | | — |
| Eastrington Ponds LNR | 9.15 ha | | — |
| Hall Garth Park | 9.04 ha | | — |
| Sugar Mill Ponds LNR | 8.87 ha | | — |
| Barn Hill Meadows SSSI | 8.63 ha | | — |
| The Maples Country Park | 8.03 ha | | — |
| Hook Island RSPB | 7.91 ha | | — |
| Walkington Park | 7.59 ha | | — |
| Storkhill Wood | 7.34 ha | | — |
| Coneygarth Lakes and Lodges Holiday Resort | 7.05 ha | | — |
| Withow Gap SSSI | 6.44 ha | | — |
| Allerthorpe Common | 6.18 ha | | — |
| Howden Marsh LNR | 6.04 ha | | — |
| Saltmarshe Delph Yorkshire Wildlife Trust | 5.98 ha | | — |
| Lund | 5.94 ha | | — |
| Ashes Playing Fields | 5.92 ha | | — |
| Foss Hill Country Park | 5.88 ha | | — |
| Snakeholme Pastures Yorkshire Wildlife Trust | 5.51 ha | | — |
| Drewton Lane Pits | 5.32 ha | | — |
| Mayfield & Broom Park LNR | 5.12 ha | | — |
| Withernsea (Millennium Green) | 4.9 ha | | — |
| Six Acre Plantation | 4.89 ha | | — |
| Sir Henry Cooper Park | 4.81 ha | | — |
| Mill Beck Nature Reserve | 4.57 ha | | — |
| Walkington Park | 4.05 ha | | — |
| Kiplingcotes Chalk Pit Yorkshire Wildlife Trust | 3.96 ha | | — |
| Everthorpe Quarry SSSI | 3.71 ha | | — |
| Beckhead Plantation SSSI | 3.6 ha | | — |
| Burnby Hall Gardens | 3.28 ha | | — |
| Enthorpe Railway Cutting SSSI | 3.08 ha | | — |
| Ings View Sports Field | 3.04 ha | | — |
| Southorpe LNR | 2.93 ha | | — |
| YWT Barmby-on-the-Marsh Wetlands Yorkshire Wildlife Trust | 2.85 ha | | — |
| Jubilee Park | 2.64 ha | | — |
| North Newbald Becksies Yorkshire Wildlife Trust | 2.22 ha | | — |
| Hoddy Cows Spring SSSI | 2.07 ha | | — |
| Awnham's Meadow | 2.05 ha | | — |
| Queen's Park | 1.97 ha | | — |
| Northend Park | 1.84 ha | | — |
| Hotham Meadow SSSI | 1.82 ha | | — |
| West Green | 1.6 ha | | — |
| Flamborough Railway Cutting SSSI | 1.59 ha | | — |
| The Park | 1.52 ha | | — |
| Westgate Park | 1.45 ha | | — |
| Bryan Mills Field SSSI | 1.38 ha | | — |
| Centenary Wood | 1.36 ha | | — |
| Archery Field | 1.34 ha | | — |
| White Carr Meadow SSSI | 1.23 ha | | — |
| Sigglesthorne Station LNR | 1.2 ha | | — |
| Neswick Gardens | 1.11 ha | | — |
| Tower Hill Memorial Park | 1.09 ha | | — |
| Louville Avenue Parkland | 1.04 ha | | — |
| Toffling Hill South Holderness Countryside Society | 0.73 ha | | — |
| Grandad's Park | 0.49 ha | | — |
| Memorial Gardens Hornsea Town Council | 0.46 ha | | — |
| Elim Gardens Hornsea Town Council | 0.39 ha | | — |
| Rifle Butts Quarry Yorkshire Wildlife Trust | 0.29 ha | | — |
| Friary Garden YHA | 0.14 ha | | — |
| Coronation Garden | 0.04 ha | | — |
| Small Park East Riding Council | 0.03 ha | | — |