Washington - Criteria: C (architecture/engineering)
| Colman Automotive Building |
| Colman Building |
| Colonial Hotel |
| Colonnade Hotel |
| Columbia City Historic District |
| Columbia County Courthouse |
| Columbia River Bridge |
| Columbia River Bridge at Bridgeport |
| Columbia River Bridge at Kettle Falls |
| Columbia River Bridge at Northport |
| Columbia River Bridge at Wenatchee |
| Columbia Theater |
| Commerce Building |
| Community Center and War Memorial Building |
| Cooper, Frank B., Elementary School |
| Corbin Park Historic District |
| Cordova Theater |
| Covington Electrical Substation, Bonneville Power Administration |
| Covington House |
| Cowen Park Bridge |
| Creaser Hotel |
| Curlew Bridge |
| Cushman No. 1 Hydroelectric Power Plant |
| Cushman No. 2 Hydroelectric Power Plant |
| Cushman Substation |
| Davenport Hotel |
| Daylight Building |
| Dearborn, Henry H., House |
| Deception Pass |
| Deep River Pioneer Lutheran Church |
| Deer Lick Cabin |
| Denver and Rio Grande Western Railroad Business Car No. 101 |
| Desmet Avenue Warehouse Historic District |
| Desolation Peak Lookout |
| Diablo Hydroelectric Power Plant |
| Dieringer School |
| Dodger Point Fire Lookout |
| Donovan, J. J., House |
| Dougherty, John and Kate, Farmstead |
| Douglas County Courthouse |
| Downtown Bellingham Historic District |
| Downtown Pomeroy Historic District |
| Downtown Waterville Historic District |
| Downtown Wenatchee Historic District |
| Duckabush River Bridge |
| Dungeness River Bridge |
| Dungeness School |
| Dunn Gardens |
| DUWAMISH |
| Eagle Ranger Station |
| Eagles Auditorium Building |
| Early Winters Ranger Station Work Center |
| East 34th Street Bridge |
| East Downtown Historic District |
| Eddy, James G., House and Grounds |
| Edgar Rock Lodge |
| Edith Creek Chlorination House |
| Elbe Evangelical Lutheran Church |
| Eldridge Avenue Historic District |
| Eldridge Building |
| Electric Light Works Building |
| Elkhorn Guard Station |
| Elk Lick Lodge |
| Elks Building |
| El Rio Apartment Hotel |
| Elwah Campground Community Kitchen |
| Elwha Ranger Station |
| Elwha River Bridge |
| Elwha River Hydroelectric Power Plant |
| Emery Farmstead |
| Empire State Building |
| Enchanted Valley Chalet |
| Engine House No. 11 |
| Engine House No. 13 |
| Engine House No. 4 |
| Engine House No. 8 |
| Engine House No. 9 |
| Enloe Dam and Powerplant |
| EQUATOR (schooner) |
| Everett Carnegie Library |
| Everett City Hall |
| Everett High School |
| Evergreen Mountain Lookout |
| Fairfax Bridge |
| Fairhaven Historic District |
| Fairweather-Trevitt House |
| Falls City Masonic Hall |
| Farrell Building |
| Federal Office Building |
| Federal Reserve Bank of San Francisco, Seattle Branch |
| Ferry, Pierre P., House |
| Fifteen Mile Shelter |
| FIREBOAT NO.1 |
| Fireboat Station |
| Fire Station No. 1 |
| Fire Station No. 10 |
| Fire Station No. 14 |
| Fire Station No. 15 |
| Fire Station No. 18 |
| Fire Station No. 2 |
Data from United States Park Service and Wikidata
