Missouri - Area of significance: Architecture
| Interstate Securities Building |
| IOOF Liberty Lodge No. 49 |
| Iron County Courthouse Buildings |
| Ironton Lodge Hall |
| Ivy Terrace |
| Jackson County Courthouse |
| Jackson County Jail and Marshal's House |
| Jackson, Prior, Homeplace |
| Jackson School |
| Jackson Uptown Commercial Historic District |
| Janssen Place Historic District |
| Jarville |
| Jasper County Courthouse |
| Jefferson-Argonne Historic District |
| Jefferson Barracks Historic District |
| Jefferson City National Cemetery |
| Jefferson Female Seminary |
| Jefferson National Expansion Memorial National Historic Site |
| Jenkins Music Company Building |
| Jensen-Salsbery Laboratories |
| Jewel Box |
| Jewell Hall |
| John, David, House |
| John Hancock Building |
| Johnson County Courthouse |
| Johnson County Courthouse |
| Johnson, George, House |
| Johnson, Juliet Trigg, House |
| Johnson, Wilbur T. and Rhoda Stephens, House |
| Jolly Mill |
| Jones, Henry, Farmstead |
| Jones, R. Bryson, House |
| Jones, Stephen M., Building |
| Jones, William Cuthbert, House |
| Joplin and Wall Avenues Historic District |
| Joplin Carnegie Library |
| Joplin Connor Hotel |
| Joplin Downtown Historic District |
| Joplin Furniture Company Building |
| Joplin Supply Company |
| Joplin Union Depot |
| Journal Printing Company Building |
| Kage School |
| Kansas City Athenaeum |
| Kansas City Club Building |
| Kansas City Cold Storage Company Building |
| Kansas City Masonic Temple |
| Kansas City National Guard Armory |
| Kansas City Parks and Boulevards Historic District |
| Kansas City Police Station Number 4 |
| Kansas City Power and Light Company Building |
| Kansas City Public Library |
| Kansas City Star Building |
| Kansas City Terminal Railway Company Roundhouse Historic District |
| Kansas City Water Department Building |
| Katz, Michael H. and Rose, House |
| Kaullen Mercantile Company |
| Keet-McElhany House |
| Keith, Charles S., House |
| Keith, David, House |
| Keller, Christian and Anna, Farmstead |
| Kelley and Browne Flats |
| Kelley-Reppert Motor Company Building |
| Kelton House |
| Kemper Addition Historic District |
| Kemper Military School Historic District |
| Kennard, J., and Sons Carpet Company Building |
| Kessler Apartments |
| Kimmswick Historic District |
| Kingshighway Hills Commercial District |
| Kirksville Courthouse Square Historic District |
| Kirkwood Missouri Pacific Depot |
| Kite, Robert B. and Vitae A., Apartment Building |
| Klepzig, Walter, Mill and Farm |
| Klostermann Block |
| Knight, Joe, Building |
| Knight, William Baker and Mary, House |
| Koch, Robert, Hospital |
| Kohmueller, Louis, House |
| Koken Barbers' Supply Co. Historic District |
| Kotthoff-Weeks Farm Complex |
| Kramer House |
| Krause, Frederick, Mansion |
| Kraus, Russell and Ruth Goetz, House |
| Kreienkamp Store |
| Kress Building |
| Kritser House |
| Krog, Albert, House |
| Krug Park Place Historic District |
| Kruse, Casper, House |
| Kuehne-Schmidt Apartments |
| Kuehn House |
| Kulage, Otto, House |
| Laclede Building |
| Laclede Gas Light Company Pumping Station G |
| Laclede's Landing |
| Ladue Estates |
| Lafayette County Courthouse |
| Lafayette Square Historic District |
| Lake of the Ozarks Recreational Demonstration Area Barn/Garage in Kaiser Area |
Data from United States Park Service and Wikidata
