Oregon - Area of significance: Architecture
| Hartley, Orrin B., House |
| Hart, Moses and Mary, Stone House and Ranch Complex |
| Haseltine, William A., House |
| Hatch, Charles and Elizabeth, House |
| Hawthorne, Rachel Louise, House |
| Haycox, Ernest, Estate |
| Hayse Blacksmith Shop |
| Heceta Head Lighthouse and Keepers Quarters |
| Heilbronner Block |
| Heimrich-Seufert House |
| Heimuller, John and Carolena, Farmstead |
| Heintz, Albert, Oscar, and Linda, House |
| Helm-Hout House |
| Hendershott, Dr. Harry M., House |
| Hendricks Building (K.O.T.M.) |
| Henry, C. K., Building |
| Heppner Hotel |
| Hershberger Mountain Lookout |
| Heryford Brothers Building |
| Heryford, William P., House |
| Heusner, George F., House |
| Hexter, Levi, House |
| Hibbert, William, House |
| Hickey, James, House |
| Hillcrest Orchard Historic District |
| Hill Hotel |
| Hill, Martin and Carrie, House |
| Hines, Pierre Rossiter and Charlotte, House |
| Hinkle-Reid House |
| Hobson-Gehlen General Merchandise Store |
| Hobson, John, House |
| Hochstedler, George, House |
| Holden, William B., House |
| Hollywood Theatre |
| Holman, Capt. Herbert, House |
| Holman, Rufus C., House |
| Holmes, Gustavus, House |
| Holmes, Harry and Eleanor, House |
| Holmes, William L., House |
| Holt-Saylor-Liberto House |
| Honeyman, David T. and Nan Wood, House |
| Honeyman, Jessie M., Memorial State Park Historic District |
| Honeyman, John S., House |
| Honeyman, Walter B. & Myrtle E., House |
| Honeymoon Creek Snow-Survey Cabin |
| Hoodoo Ridge Lookout |
| Hood River County Library and Georgiana Smith Park |
| Hood River High School |
| Hope-Van Allen House |
| Hotel Alder |
| Hotel Ramapo |
| Hotel Western |
| Hot Lake Resort |
| Hover, George A., House |
| Howe, C. J., Building |
| Howell, John W., House |
| Howell-Kohlhagen House |
| Hudelson, A.B. and Son, Building |
| Hughes, Patrick, House |
| Humason, Orlando, House |
| Hunter-Morelock House |
| Hyland, Olive and Ellsworth, Apartments |
| Imbrie Farm |
| Imnaha Guard Station |
| Imperial Garage |
| Imperial Hotel |
| Independence Historic District |
| Independence National Bank |
| Independence Prairie Ranger Station |
| Inman, Clarissa McKeyes, House |
| International Harvester Company Warehouse |
| IOOF Building |
| I.O.O.F. Organization Camp, Paulina Lake |
| Ireland, Sarah E., House |
| Irving Street Bowman Apartments |
| Irvington Bowman Apartments |
| Irvington Historic District |
| Irvington Tennis Club |
| Irwin, Richard S., Barn |
| Isom, Mary Frances, Cottage |
| Jackson County Courthouse |
| "Jackson, C. S. ""Sam"", Log House" |
| Jacobberger, Josef, House |
| Jacobberger, Joseph, Country House |
| Jacobs-Wilson House |
| James, W. Leland, House |
| Jantzen Knitting Mills Company Building |
| Jarman, Daniel B., House and Garden |
| Jeanne Manor Apartment Building |
| Jefferson Methodist Church |
| Jefferson Substation |
| Jeffrey, Oliver and Margaret, House |
| Jenkins, Belle Ainsworth, Estate |
| Jensen Investment Company Building |
| Jeppesen, Peter, House |
| Jessen-Goodrich House |
| J.L. Elam Bank |
| John Day Compound, Supervisor's Warehouse |
| Johnson, Charles E., Building |
| Johnson-Ellis House |
Data from United States Park Service and Wikidata
