All - Constructed - 1900–1909
| Jones, Fred B., Estate |
| Jones, Granville D., House |
| Joppa Baptist Church and Cemetery |
| Jordan, Dr. Arch, House |
| Jorgenson, Chris, Studio |
| Jung Shoe Manufacturing Company Factory |
| Juniper Hill Farm-Maxwell Evarts House |
| Kahn, Albert, House |
| Kaiser, John, House |
| Kaufman, Frank J., House |
| Kearney County Courthouse |
| Kearney, M. Theo, Park and Mansion |
| Kearns Building |
| Keene, Walter, House |
| Keith-O'Brien Building |
| Kellogg Public Library and Neville Public Museum |
| Kelly, T.R., House |
| Kemp & Hebert Building |
| Kendrick Fraternal Temple |
| Kenosha North Pierhead Light |
| Kent, Jerry, House |
| Kent, Rockwell, Cottage and Studio |
| Kentucky Camp Historic District |
| Kentucky State Capitol |
| Kesterson-Watkins House |
| Kestner Homestead |
| Kevin Depot |
| Keystone Community Church |
| Kieldson Double House |
| Killcreas House |
| Kimball Public Library |
| King, Edward Moody, House |
| Kingman County Courthouse |
| King, Patrick J., House |
| Kinner House |
| Kinsey, The |
| Kintla Lake Ranger Station |
| Kiowa County Courthouse |
| Kirchman, F.J., House |
| Kling, Amos, House |
| Knudsen, Christian and Sarah, House |
| Kohlhagen Building |
| Koochiching County Courthouse |
| Koshland House |
| Krause, Daniel E., Stone Barn |
| Kremer, Peter, House |
| Kromer Flats |
| Kuehle, Henry, Investment Property |
| Kuns-Collier House |
| Kurth, John H., and Company Office Building |
| LaBarre House |
| La Crosse Armory |
| La Crosse County School of Agriculture and Domestic Economy |
| Lacy Homestead |
| Ladies' Relief Society Children's Home |
| Lafayette County Courthouse |
| Lafayette High School |
| Lakeview School |
| Lakewood Cemetery Memorial Chapel |
| Lamar Buffalo Ranch |
| Lamar Community Center |
| Lamar House Hotel |
| Lamb Building |
| Lamb's Club |
| Lamp, Robert M., House |
| Lancaster and Waumbek Apartments |
| Lancaster House |
| Lander College Old Main Building |
| Langlade County Courthouse |
| Lanier, James F. D., Residence |
| Lanning, T., & Co. Department Store |
| Lanter, Franklin R., House |
| Larsen, Aage and Kristine, Homestead |
| Larsen, Chris, House |
| Larsen Family House |
| Larson, Lars Peter, House |
| Larson's Hunters Resort |
| Lathrop Hall |
| Lauerman Brothers Department Store |
| Laurelhurst Historic District |
| Laurelhurst Park |
| Lawrence Light Guard Armory |
| Lawrence Opera House |
| Leaf River Bridge |
| League Park |
| Leavenworth Public Library |
| Lebanon School |
| Lebanon Woolen Mills |
| Lee County Courthouse |
| Lee, John E., House |
| Lee Paper Company Mill Complex |
| Leiendecker's Inn-Coral Gables |
| Leighton, Adam P., House |
| Leith, Doctor Alexander R. (A.R.) and Louisa J., House |
| Lemhi Boarding School Girls Dormitory |
| Lemhi County Courthouse |
| Lemmon, G. E., House |
| Lemmon, Leander, House |
| Lenoir Cotton Mill-Blue Bell Inc. Plant |
| Lenont, Charles, House |
Data from United States Park Service and Wikidata
