All - Constructed - 1890–1899
| House at 52 Oak Street |
| House at 555 Deer Valley Road |
| House at 556 Lowell Street |
| House at 5-7 Winter Street |
| House at 622 Rossie Hill Drive |
| House at 77 Howard Street |
| House at 816 Jackson Street |
| House at 912 Magoffin Avenue |
| House at 931 Prince |
| House at 94 Grandview Avenue |
| Houston Heights Waterworks Reservoir |
| Hughes A.M.E. Chapel |
| Hull-Rust-Mahoning Open Pit Iron Mine |
| Hultgren, Louis, House and Sand Pit |
| Hunt, Daniel, Three-Decker |
| Hunt-Sitterding House |
| Hurlbut, Aeneas-Yates, Charles, House |
| Hurlbut Memorial Gate |
| Hyde School |
| Hydeville School |
| Ihm House |
| Illinois Central Railroad Depot |
| Imperial Hotel |
| Indian Creek Covered Bridge |
| Indian Oaks |
| Indian Shaker Church and Gulick Homestead |
| Indian Stream Schoolhouse |
| Ingraham, Charles H., Cottage |
| Inman I.O.O.F. Hall |
| Interlachen Hall |
| Intermediate Building |
| International Trust Company Building |
| Interstate Power Company Building |
| I.O.O.F. (International Order of Odd Fellows) Valley Junction Lodge Hall No. 604 |
| Iredell County Courthouse |
| Ironwood City Hall |
| Irvine Bean and Growers Association Building |
| Irving School |
| Itasca State Park |
| Ivandale |
| Iverson-Johnson House |
| Ivinson Mansion and Grounds |
| Ivy Terrace |
| Jackson County Courthouse |
| Jackson Street Freedman's Cottages |
| James, Joseph K., House |
| Janin Store |
| Jarvis, The |
| Jefferson Hotel |
| Jenkins, Franklin B., House |
| Jenkins, Joseph J., House |
| Jennings, Ellis, House |
| Jensen, Frederick C., House |
| Jewett Piano Company Building |
| Johns Hotel |
| Johnson County Courthouse |
| Johnson House |
| Johnson-Kearns Hotel |
| Johnson, Mrs. Lydia, House |
| Johnson-Nielson House |
| Johnson, Wilbur T. and Rhoda Stephens, House |
| Johnston, Darius David, House |
| Jones, Frederick Issac and Mary M., House |
| Jordon, Col, Meltiah, House |
| Journal Building |
| Juab County Jail |
| Kasson Water Tower |
| Kauffman, William, House |
| Keck, H.C., House-Mt. Olivet Parsonage |
| Keene Unitarian Universalist Church |
| Keeper's House at Williamsbridge Reservoir |
| Keney Tower |
| Kennebec River Light Station |
| Kernan, James Lawrence, Hospital |
| Kernodle-Pickett House |
| KESTREL (steam yacht) |
| Kewaunee Pierhead Lighthouse |
| Keys Desert Queen Ranch |
| Keystone School |
| Kidd, Charles I., House |
| Kilby, James Henry and Rachel, House |
| Kilgore Mill Covered Bridge and Mill Site |
| Kingfisher College Site |
| King, John A., House |
| Kingsbury County Courthouse |
| Kinner, John, House |
| Kirker Covered Bridge |
| Kirkland Hotel |
| Kirkwood Missouri Pacific Depot |
| Kistler House |
| Klein Dairy Farmhouse |
| Kleinschmidt, T. H., House |
| Knights of Pythias Building and Theatre |
| Knotts, Nellie and Thomas, House |
| Knudson, Jonathan and Jennie, House |
| Kruempelman Farmhouse |
| Kuhre, William D., House |
| Ladd Observatory |
| Lafayette Hardware Store |
| LaFollette House |
Data from United States Park Service and Wikidata
