All - Constructed - 1900–1909
| Hopkinton Supply Co. Building |
| Hopper Academy |
| Hopwood Hall |
| Hord, Heber, House |
| Hose Station No. 7 |
| Hosmer Dairy Farm Historic District |
| Hotel Arthur |
| Hotel Blessing |
| Hotel Boulderado |
| Hotel Chauvet |
| Hotel Laube |
| Hotel Lindo |
| Hotel Metropole |
| Hotel Oregon |
| Hotel Sorrento |
| Hottes, Fred, House |
| Housatonic River Railroad Bridge |
| House at 152 Suffolk Road |
| House at 15 Gilmore Street |
| House at 16 Grand |
| House at 242 Summer Avenue |
| House at 32 Morrison Road |
| House at 491 Prospect Street |
| House at 6 Adams Street |
| House at 89 Rawson Road and 86 Colburne Crescent |
| House at 9 White Avenue |
| Houston Carnegie Library |
| Houston Fire Station No. 3 |
| Houston House |
| Hoverhome and Hover Farmstead |
| Howard's Covered Bridge |
| Howe, Edward P., Jr., House |
| Hubbard County Courthouse |
| Hub Building |
| Huddleston, Judge Killis, House |
| Hudson and Manhattan Railroad Powerhouse |
| Hudson Theatre |
| Hughes, David and M. Maria, House |
| Huhn-Harrison House |
| Hull, James Heyward, House |
| Humes Ranch Cabin (Boundary Increase) |
| Humphrey City Hall |
| Hunter Saw & Machine Company |
| Huntley, A. O., Barn |
| Hutchins Bridge |
| Hutton Building |
| Hyrum First Ward Meetinghouse |
| I00F Building |
| Illinois Envelope Co. Building |
| Immaculate Conception Church |
| Immaculate Conception Church |
| Immaculate Conception Rectory |
| Immanuel Episcopal Church |
| Immanuel School of Industries-Department of Public Welfare |
| Independence Building |
| Independence Public Carnegie Library |
| Indera Mills |
| Indianapolis Motor Speedway |
| Indianapolis Outing Club |
| Indianola Carnegie Library |
| Indian Orchard Branch Library |
| Inez Hotel |
| Ingle Brothers Broomcorn Warehouse |
| Ingraham, Robert C., School |
| International Harvester Showroom and Warehouse |
| International Hotel |
| Interrorem Guard Station-Olympic National Forest |
| Iowa Wind Mill and Pump Company Office and Warehouse |
| Irvington Town Hall |
| Isle Au Haut Light Station |
| Ivanhoe Apartments |
| Jackson County Courthouse |
| Jackson, Dr. F. W., House |
| Jacobsen, N. A., Building |
| Jacobs, Felix A., House |
| Jacobs, Michael, House |
| Jansen House |
| Jefferson County Armory |
| Jefferson County Courthouse |
| Jefferson Davis County Courthouse |
| Jefferson School |
| Jefferson Substation |
| Jensen, Joseph F. and Isabelle, House |
| Jenson, Jens Larson, Lime Kiln |
| Jersey City High School |
| Jesse Reno School |
| Jess Valley Schoolhouse |
| Jewell Building |
| Jicarilla Schoolhouse |
| Jischke's Meat Market |
| Johnson, A.P., House |
| Johnson-Campbell House |
| Johnson, Kemp B., House |
| Johnson-Tillotson House |
| Johnson, William Jasper, House |
| Johnston Hall |
| Joliet Bridge |
| Joliet Township High School |
| Jones, Dudley, House |
| Jones, Frank and Amelia, House |
Data from United States Park Service and Wikidata
