Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Washington Creek | Stream | | Lewis | 46 41 01 N | 122 08 36 W |
| Washington Creek | Stream | | Mason | 47 34 09 N | 123 08 37 W |
| Washington Elementary School | School | 117 | Benton | 46 11 19 N | 119 07 07 W |
| Washington Elementary School | School | 253 | Chelan | 47 25 16 N | 120 20 10 W |
| Washington Elementary School | School | 53 | Clark | 45 38 34 N | 122 39 07 W |
| Washington Elementary School | School | 26 | King | 47 18 29 N | 122 13 18 W |
| Washington Elementary School | School | 474 | Kittitas | 46 59 50 N | 120 32 32 W |
| Washington Elementary School | School | 56 | Lewis | 46 42 31 N | 122 57 12 W |
| Washington Elementary School | School | 108 | Pierce | 47 16 17 N | 122 29 13 W |
| Washington Elementary School | School | 7 | Skagit | 48 25 12 N | 122 20 55 W |
| Washington Elementary School | School | 31 | Snohomish | 47 59 38 N | 122 12 18 W |
| Washington Elementary School | School | 225 | Yakima | 46 19 07 N | 120 00 38 W |
| Washington Flat | Flat | 730 | Chelan | 47 56 46 N | 119 58 46 W |
| Washington Flats | Flat | 332 | Douglas | 47 59 23 N | 118 58 07 W |
| Washington Harbor | Populated Place | -3 | Clallam | 48 04 44 N | 123 02 43 W |
| Washington High School | School | 90 | Pierce | 47 08 45 N | 122 27 23 W |
| Washington Islands Wilderness | Reserve | 0 | Jefferson | 47 44 39 N | 124 29 45 W |
| Washington Junior High School | School | 321 | Yakima | 46 35 52 N | 120 29 33 W |
| Washington Lawn Cemetery | Cemetery | 56 | Lewis | 46 43 15 N | 122 57 49 W |
| Washington Memorial Park | Cemetery | 119 | King | 47 27 17 N | 122 17 45 W |
| Washington Middle School | School | 83 | King | 47 35 54 N | 122 18 13 W |
| Washington Middle School | School | 63 | Thurston | 47 01 15 N | 122 52 06 W |
| Washington Monument | Pillar | 1288 | Skagit | 48 37 45 N | 121 49 54 W |
| Washington Park | Park | 238 | Chelan | 47 25 18 N | 120 19 35 W |
| Washington Park | Park | 21 | King | 47 38 20 N | 122 17 46 W |
| Washington Park | Park | 27 | Skagit | 48 29 53 N | 122 41 46 W |
| Washington Park | Populated Place | 319 | Yakima | 46 35 48 N | 120 29 17 W |
| Washington Park Arboretum | Park | 37 | King | 47 38 08 N | 122 17 46 W |
| Washington Pass | Gap | 1660 | Chelan | 48 31 26 N | 120 39 15 W |
| Washington Pass | Gap | 599 | Mason | 47 31 38 N | 123 08 46 W |
| Washington Rock | Summit | 792 | Pend Oreille | 48 52 03 N | 117 22 28 W |
| Washington School | School | 29 | Clallam | 48 06 57 N | 123 25 34 W |
| Washington School | School | 39 | Cowlitz | 46 08 51 N | 122 54 22 W |
| Washington School | School | 9 | Grays Harbor | 46 58 02 N | 123 48 08 W |
| Washington School | School | 4 | Grays Harbor | 46 58 29 N | 123 52 01 W |
| Washington School | School | 13 | Kitsap | 47 33 57 N | 122 39 06 W |
| Washington School | School | 21 | Thurston | 47 02 36 N | 122 53 15 W |
| Washington School | School | 279 | Walla Walla | 46 04 06 N | 118 21 07 W |
| Washington School | School | 32 | Whatcom | 48 45 43 N | 122 28 35 W |
| Washington School for the Blind | School | 50 | Clark | 45 37 52 N | 122 38 53 W |
| Washington School for the Deaf | School | 42 | Clark | 45 37 30 N | 122 38 22 W |
| Washington State Capitol | Building | 40 | Thurston | 47 02 07 N | 122 54 23 W |
| Washington State Capitol Museum | Building | 51 | Thurston | 47 01 46 N | 122 54 08 W |
| Washington State Patrol Academy | School | 91 | Mason | 47 15 04 N | 123 09 37 W |
| Washington State Penitentiary | Building | 288 | Walla Walla | 46 04 49 N | 118 21 34 W |
| Washington State University | School | 781 | Whitman | 46 43 52 N | 117 09 30 W |
| Washington State University Experimental Station | School | 260 | Benton | 46 15 16 N | 119 44 09 W |
| Washington State University Tree Fruit Experiment Station | Locale | 240 | Chelan | 47 26 22 N | 120 20 50 W |
| Washington Vocational Tech School | School | -3 | King | 47 41 14 N | 122 06 28 W |
| Washougal | Populated Place | 25 | Clark | 45 34 57 N | 122 21 12 W |
| Washougal High School | School | 39 | Clark | 45 35 06 N | 122 19 35 W |
| Washougal Lake | Lake | 158 | Clark | 45 39 06 N | 122 20 26 W |
| Washougal Lower Range | Channel | 6 | Clark | 45 34 18 N | 122 21 43 W |
| Washougal Memorial Cemetery | Cemetery | 49 | Clark | 45 35 17 N | 122 19 57 W |
| Washougal Ponds | Lake | 202 | Skamania | 45 39 14 N | 122 10 08 W |
| Washougal Radio Fan Marker Beacon | Locale | 363 | Skamania | 45 39 10 N | 122 14 34 W |
| Washougal Ranger Station | Locale | 400 | Skamania | 45 40 17 N | 122 08 13 W |
| Washougal River | Stream | | Clark | 45 34 43 N | 122 24 00 W |
| Washougal State Salmon Hatchery | Locale | 187 | Skamania | 45 39 11 N | 122 10 08 W |
| Washougal Trail | Trail | 547 | Skamania | 45 46 09 N | 122 07 38 W |
| Washougal Upper Range | Channel | 6 | Clark | 45 34 04 N | 122 21 05 W |
| Washout | Stream | | Yakima | 46 23 40 N | 119 59 24 W |
| Washout Gulch | Valley | | Yakima | 46 33 23 N | 120 20 39 W |
| Washout Spring | Spring | 452 | Yakima | 46 25 19 N | 119 59 29 W |
| Washtucna | Populated Place | 313 | Adams | 46 45 24 N | 118 18 38 W |
| Washtucna Coulee | Valley | | Adams | 46 45 11 N | 118 16 49 W |
| Washtucna Elementary School | School | 315 | Adams | 46 45 10 N | 118 18 34 W |
| Washtucna High School | School | 315 | Adams | 46 45 10 N | 118 18 34 W |
| Washtucna Lake | Lake | 263 | Franklin | 46 38 54 N | 118 29 58 W |
| Wasp Islands | Island | 0 | San Juan | 48 35 41 N | 123 01 39 W |
| Wasp Passage | Channel | 9 | San Juan | 48 35 32 N | 122 59 23 W |
| Wasp Passage Light | Locale | 2 | San Juan | 48 35 42 N | 122 58 36 W |
| Wasteway 3 | Canal | 333 | Yakima | 46 28 51 N | 120 21 01 W |
| Watch Creek | Stream | | Pend Oreille | 48 59 36 N | 117 07 11 W |
| Watch Lake | Lake | 1086 | Lewis | 46 34 25 N | 121 58 28 W |
| Watch Lake | Lake | 1976 | Pend Oreille | 48 56 14 N | 117 09 11 W |
| Watch Mountain | Summit | 1352 | Lewis | 46 34 14 N | 121 57 46 W |
| Watch Mountain Lookout Tower | Tower | 1391 | Lewis | 46 34 14 N | 121 59 13 W |
| Water Canyon | Valley | | Whitman | 46 34 55 N | 117 18 25 W |
| Water Creek | Stream | | Lewis | 46 28 19 N | 123 06 04 W |
| Water Falls Spring | Spring | 459 | Lincoln | 47 25 25 N | 118 51 47 W |
| Water Mill Creek | Stream | | Lewis | 46 33 51 N | 123 18 27 W |
| Watercress Springs | Spring | 397 | Okanogan | 48 22 59 N | 119 35 36 W |
| Waterford | Populated Place | 22 | Wahkiakum | 46 09 11 N | 123 16 04 W |
| Waterfront Park | Park | 239 | Douglas | 48 00 52 N | 119 40 37 W |
| Waterfront Park | Park | 6 | King | 47 36 24 N | 122 20 29 W |
| Waterhole | Lake | 770 | Klickitat | 45 49 41 N | 121 18 52 W |
| Waterhole Creek | Stream | | Pierce | 47 03 59 N | 122 05 33 W |
| Watering Trough Canyon | Valley | | Yakima | 46 50 33 N | 120 44 34 W |
| Waterloo | Populated Place | 719 | Stevens | 48 22 03 N | 118 07 04 W |
| Waterloo Marsh | Swamp | 36 | Island | 48 16 39 N | 122 41 34 W |
| Waterloo School | School | 728 | Stevens | 48 22 07 N | 118 06 59 W |
| Waterman | Populated Place | 8 | Kitsap | 47 34 24 N | 122 34 50 W |
| Waterman Gulch | Valley | | Columbia | 46 16 31 N | 117 39 26 W |
| Waterman Point | Populated Place | 1 | Kitsap | 47 35 04 N | 122 34 11 W |
| Watermaster Headquarters | Building | 370 | Grant | 46 54 18 N | 119 44 46 W |
| Watermelon Hill | Summit | 671 | Lincoln | 47 20 12 N | 117 52 06 W |
| Waterville | Populated Place | 800 | Douglas | 47 38 49 N | 120 04 16 W |
| Waterville Airport | Airport | 806 | Douglas | 47 39 20 N | 120 03 19 W |
| Waterville Elementary School | School | 801 | Douglas | 47 38 43 N | 120 04 13 W |
| Waterville Junior-Senior High School | School | 801 | Douglas | 47 38 43 N | 120 04 13 W |
| Waterville Plateau | Plain | 870 | Douglas | 47 40 57 N | 120 04 06 W |
| Waterville Sewage Disposal Pond | Reservoir | 773 | Douglas | 47 37 47 N | 120 03 28 W |
| Waterville Sewage Disposal Pond Dam | Dam | 772 | Douglas | 47 37 47 N | 120 03 28 W |
| Waterworks Canyon | Valley | | Yakima | 46 44 55 N | 120 47 49 W |
| Watmough Bay | Bay | -3 | San Juan | 48 25 54 N | 122 48 42 W |
| Watmough Head | Summit | 70 | San Juan | 48 25 42 N | 122 48 48 W |
| Watson Airport | Airport | 425 | Franklin | 46 42 60 N | 118 37 04 W |
| Watson Creek | Stream | | Mason | 47 35 23 N | 123 07 08 W |
| Watson Creek | Stream | | Skagit | 48 37 08 N | 121 36 32 W |