Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| High Drive Parkway | Park | 701 | Spokane | 47 37 07 N | 117 25 16 W |
| Highland Park | Park | 31 | Cowlitz | 46 08 58 N | 122 53 57 W |
| Highlands Park | Park | 4 | Cowlitz | 46 07 17 N | 122 57 23 W |
| Hillaire Park | Park | 128 | King | 47 36 53 N | 122 07 43 W |
| Hillcrest Park | Park | 52 | Skagit | 48 24 32 N | 122 19 38 W |
| Hilltop Park | Park | 103 | King | 47 29 24 N | 122 18 00 W |
| Hisey Park | Park | 214 | Yakima | 46 20 07 N | 120 11 44 W |
| Historical Marker Connels Prairie Battle | Park | 171 | Pierce | 47 11 19 N | 122 07 38 W |
| Historical Marker Fort Henness Site | Park | 57 | Thurston | 46 49 20 N | 123 01 16 W |
| Historical Monument | Park | 746 | Spokane | 47 44 43 N | 117 44 26 W |
| Hite Park | Park | 644 | Spokane | 47 57 32 N | 117 28 59 W |
| Hoffstadt Creek Park | Park | 292 | Cowlitz | 46 20 16 N | 122 31 15 W |
| Holiday Park | Park | 99 | Pierce | 47 07 04 N | 122 28 01 W |
| Hollerbach Park | Park | 75 | King | 47 33 56 N | 122 13 02 W |
| Holmberg Park | Park | 594 | Spokane | 47 44 41 N | 117 25 20 W |
| Homestead Field | Park | 78 | King | 47 34 26 N | 122 13 51 W |
| Hood Park | Park | 107 | Walla Walla | 46 12 43 N | 119 00 53 W |
| Hoodsport Trail State Park | Park | 203 | Mason | 47 24 56 N | 123 11 35 W |
| Horn Rapids County Park | Park | 138 | Benton | 46 22 51 N | 119 26 02 W |
| Horsethief Lake State Park | Park | 50 | Klickitat | 45 38 43 N | 121 06 18 W |
| Houghton Beach Park | Park | 15 | King | 47 39 37 N | 122 12 24 W |
| Hovander Homestead Park | Park | 9 | Whatcom | 48 50 02 N | 122 35 25 W |
| Hover Park | Park | 106 | Benton | 46 06 17 N | 118 58 12 W |
| Howard Amon Park | Park | 104 | Benton | 46 16 27 N | 119 16 15 W |
| Ice Caves State Park | Park | 552 | Okanogan | 47 54 39 N | 119 55 59 W |
| Iceberg Island State Marine Park | Park | 3 | San Juan | 48 25 43 N | 122 53 23 W |
| Idylwood Park | Park | 9 | King | 47 38 35 N | 122 06 08 W |
| Ike Kinswa State Park | Park | 134 | Lewis | 46 33 54 N | 122 32 09 W |
| Illahee State Park | Park | 73 | Kitsap | 47 35 49 N | 122 35 55 W |
| Indian Canyon Park | Park | 616 | Spokane | 47 39 07 N | 117 28 37 W |
| Indian Dan State Wildlife Recreation Area | Park | 540 | Okanogan | 48 06 42 N | 119 51 41 W |
| Indian Painted Rocks State Park | Park | 359 | Yakima | 46 37 46 N | 120 35 02 W |
| Indian Rock Paintings State Park | Park | 471 | Spokane | 47 46 55 N | 117 30 01 W |
| Indian Trail Park | Park | 616 | Spokane | 47 43 16 N | 117 28 11 W |
| Inglemoor County Park | Park | 121 | King | 47 44 13 N | 122 13 33 W |
| Inning Field | Park | 244 | Okanogan | 48 05 34 N | 119 47 07 W |
| Interlaken Park | Park | 63 | King | 47 38 08 N | 122 18 31 W |
| Interstate Fairgrounds | Park | 589 | Spokane | 47 39 46 N | 117 20 25 W |
| Isaac Evans Park | Park | 37 | King | 47 19 42 N | 122 12 21 W |
| Island Crest Park | Park | 101 | King | 47 33 05 N | 122 13 27 W |
| Ivanhoe Park | Park | 129 | King | 47 37 26 N | 122 07 04 W |
| Jackson Court House State Park | Park | 166 | Lewis | 46 32 31 N | 122 49 19 W |
| Jacobys Shorecrest County Park | Park | 19 | Mason | 47 12 28 N | 123 03 44 W |
| James Island State Park | Park | 3 | San Juan | 48 30 45 N | 122 46 31 W |
| James J Lawless Park | Park | 110 | Benton | 46 15 57 N | 119 17 16 W |
| James Park | Park | 9 | Clallam | 47 54 55 N | 124 36 10 W |
| Jarrell Cove State Park | Park | 22 | Mason | 47 16 59 N | 122 52 60 W |
| Jefferson Park | Park | 109 | Benton | 46 17 22 N | 119 16 25 W |
| Jefferson Park | Park | 108 | King | 47 34 07 N | 122 18 19 W |
| Jefferson Park | Park | 282 | Walla Walla | 46 03 15 N | 118 20 35 W |
| Jewett Creek Park | Park | 185 | Klickitat | 45 43 38 N | 121 28 19 W |
| Jim Hill Park | Park | 622 | Spokane | 47 42 33 N | 117 22 22 W |
| John Day Park | Park | 150 | Benton | 46 13 05 N | 119 10 32 W |
| John Day Wildlife Management Area | Park | 124 | Benton | 45 56 03 N | 119 30 39 W |
| John Dobson Park | Park | 139 | Lewis | 46 39 49 N | 122 57 38 W |
| John Gable Community Park | Park | 7 | Grays Harbor | 46 58 56 N | 123 55 05 W |
| John MacDonald Tolt River Park | Park | 22 | King | 47 38 30 N | 121 55 14 W |
| John Simpson Memorial Park | Park | 247 | Chelan | 47 31 00 N | 120 28 34 W |
| John Storvik Playground | Park | 31 | Skagit | 48 29 50 N | 122 36 57 W |
| Johns River State Wildlife Recreation Area | Park | 4 | Grays Harbor | 46 53 41 N | 123 59 09 W |
| Jonathan Hartman Park | Park | 114 | King | 47 41 29 N | 122 06 31 W |
| Jones Island State Park National Wildlife Refuge | Park | 47 | San Juan | 48 36 54 N | 123 02 47 W |
| Joseph Whidbey State Park | Park | 33 | Island | 48 19 44 N | 122 41 33 W |
| Juanita Beach Park | Park | 9 | King | 47 42 18 N | 122 12 54 W |
| Judkins Park | Park | 64 | King | 47 35 39 N | 122 18 14 W |
| Kamiak Butte State Park | Park | 960 | Whitman | 46 51 56 N | 117 09 49 W |
| Kanaskat-Palmer Recreation Area | Park | 240 | King | 47 19 01 N | 121 53 31 W |
| Kanaskat-Palmer State Park | Park | 244 | King | 47 19 03 N | 121 54 09 W |
| Keaney Park | Park | 91 | King | 47 37 13 N | 122 06 34 W |
| Keewaydin Park | Park | 120 | Benton | 46 12 17 N | 119 07 14 W |
| Kelsey Creek Park | Park | 13 | King | 47 36 10 N | 122 09 46 W |
| Kendall Monument | Park | 1377 | Columbia | 46 14 50 N | 117 45 37 W |
| Kennewick Game Farm (historical) | Park | 106 | Benton | 46 09 19 N | 119 01 14 W |
| Kennydale Lions Park | Park | 93 | King | 47 30 49 N | 122 11 24 W |
| Kenroy Park | Park | 302 | Douglas | 47 24 55 N | 120 16 06 W |
| Kid Valley Park | Park | 193 | Cowlitz | 46 21 55 N | 122 37 46 W |
| Killarney Glen Park | Park | 41 | King | 47 35 37 N | 122 12 12 W |
| King County Enumclaw Park | Park | 250 | King | 47 11 49 N | 121 57 19 W |
| King County Park | Park | 161 | King | 47 39 32 N | 122 09 59 W |
| Kings Garden | Park | 136 | King | 47 46 02 N | 122 21 25 W |
| Kinnear Park | Park | 75 | King | 47 37 38 N | 122 22 01 W |
| Kitsap Memorial State Park | Park | 14 | Kitsap | 47 49 03 N | 122 39 06 W |
| Kiwanis Field | Park | 45 | Kitsap | 47 33 57 N | 122 38 35 W |
| Kiwanis Park | Park | 30 | King | 47 41 25 N | 122 13 00 W |
| Kiwanis Park | Park | 484 | Kittitas | 47 00 19 N | 120 32 54 W |
| Kiwanis Park | Park | 248 | Walla Walla | 46 02 54 N | 118 22 59 W |
| Kiwanis Park | Park | 318 | Yakima | 46 36 02 N | 120 29 04 W |
| Klapatche Park | Park | 1751 | Pierce | 46 50 04 N | 121 52 23 W |
| Klondike Gold Rush National Historic Park | Park | 9 | King | 47 35 59 N | 122 19 59 W |
| Knox Park | Park | 602 | Spokane | 47 40 36 N | 117 17 15 W |
| Kopachuck State Park | Park | 24 | Pierce | 47 18 59 N | 122 40 42 W |
| L Street Park | Park | 28 | Grays Harbor | 46 58 49 N | 123 49 40 W |
| L T Murray State Wildlife Recreation Area | Park | 706 | Kittitas | 46 49 05 N | 120 32 33 W |
| Lacamas Park | Park | 67 | Clark | 45 35 53 N | 122 23 27 W |
| Ladysmith Park | Park | 23 | Grays Harbor | 47 00 30 N | 123 24 42 W |
| Lake Chelan National Recreation Area | Park | 1537 | Chelan | 48 21 59 N | 120 38 04 W |
| Lake Chelan State Park | Park | 336 | Chelan | 47 52 14 N | 120 11 34 W |
| Lake Cushman State Park | Park | 247 | Mason | 47 28 13 N | 123 13 25 W |
| Lake Easton State Park | Park | 671 | Kittitas | 47 15 19 N | 121 12 03 W |
| Lake Fenwick Park | Park | 48 | King | 47 22 06 N | 122 16 31 W |
| Lake Francis Park | Park | 139 | King | 47 25 18 N | 122 01 01 W |
| Lake Hills Green Belt Park | Park | 81 | King | 47 36 01 N | 122 08 08 W |
| Lake Hills Park | Park | 90 | King | 47 35 54 N | 122 07 18 W |
| Lake Lenore State Wildlife Management Area | Park | 488 | Grant | 47 30 43 N | 119 29 44 W |
| Lake Meridian Park | Park | 111 | King | 47 21 45 N | 122 08 23 W |
| Lake Newport State Park | Park | 630 | Pend Oreille | 48 13 60 N | 117 09 14 W |
| Lake Osoyoos State Park | Park | 279 | Okanogan | 48 56 57 N | 119 25 58 W |
| Lake Osoyoos State Park | Park | 280 | Okanogan | 48 56 59 N | 119 25 58 W |
| Lake Pleasant Recreation Area | Park | 122 | Clallam | 48 03 31 N | 124 20 15 W |
| Lake Roesiger Park | Park | 219 | Snohomish | 47 58 51 N | 121 54 48 W |