Washington - Role: Building
| Hale, Calvin and Pamela, House |
| Haller, Colonel Granville & Henrietta, House |
| Hallett House |
| Hamilton-Worthington House |
| Ham-McEachern House |
| Hanford, Edwin H., House |
| Hansen, Julia Butler, House |
| Happy Four Shelter |
| Harper, F. C., House |
| Harrington Bank Block and Opera House |
| Harstine Island Community Hall |
| Hartley, Roland, House |
| Hartline School |
| Hawthorne Square |
| Heisen, Henry, House |
| Hershey, Peter L. and Emma, Homestead |
| Hidden Houses |
| High Bridge Shelter |
| Highland Apartments |
| Hill-Hilscher House |
| Hill, Samuel, House |
| Hillyard High School |
| Hjertoos, Andrew and Bergette, Farm |
| Hodgdon, Judge Charles W., House |
| Hoge Building |
| Holley-Mason Building |
| Hollywood Farm |
| Holy Cross Polish National Catholic Church |
| Holy Names Academy Building |
| Holyoke Building |
| Holy Trinity Episcopal Church |
| Holy Trinity Orthodox Church |
| Home of the Good Shepherd |
| Home School |
| Hoogdal School |
| Hoquiam Olympic Stadium |
| Hoquiam's Castle |
| Horan, Michael, House |
| Hotel Collins |
| Hotel Laube |
| Hotel Morck |
| Hotel Sorrento |
| Hotel Upton |
| House at 1510 Tacoma Avenue South |
| House at 1610 South G Street |
| House at 1723 Holcomb Street |
| House at 2314 South Ainsworth Avenue |
| House at 2326 South L Street |
| House at 30 Tremont Street |
| House at 503 Fir Street |
| House at 605 South G Street |
| House at 708-710 South 8th Street |
| House at 802-804 South G Street |
| House of Providence |
| Howard, A. E., House |
| Howay-Dykstra House |
| Hubbard Bungalow |
| Huckleberry Creek Patrol Cabin |
| Hulbert, Edward & Laura, House |
| Hull Building |
| Humes Ranch Cabin |
| Hutton Building |
| Hutton, Levi and May Arkwright, House |
| Hyak Shelter |
| Hyde, Samuel, House |
| Hyer, John A., Farm |
| Immanuel Lutheran Church |
| Immanuel School of Industries-Department of Public Welfare |
| Independent Order of Odd Fellows (IOOF) Hall No. 148 |
| Indian Bar Trail Shelter |
| Indian Henry's Patrol Cabin |
| Indian Shaker Church |
| Interlake Public School |
| Interrorem Guard Station-Olympic National Forest |
| Ipsut Creek Patrol Cabin |
| Irish, William N., House |
| Irondale Jail |
| Israel, Grover J., House |
| Issaquah Depot |
| Issaquah Sportsmen's Club |
| Jaaska House and Warehouse |
| Jackson Hall Memorial Community Hall |
| Jackson, John R., House |
| James, Francis Wilcox, House |
| Jefferson County Courthouse |
| Jeffers Studio |
| Johnson House |
| Johnson House |
| Jovita Land Company Model Home-Corbett House |
| Keeler's Korner |
| Keewaydin Clubhouse |
| Keller House |
| Kelley, Mancel, House |
| Kemp & Hebert Building |
| Kiesow-Gentsch House |
| Kiggins, John P. and Mary, House |
| Kiggins Theater |
| King Street Station |
| Kirkland Woman's Club |
| Kirk, Lilly, House |
Data from United States Park Service and Wikidata
