Kentucky - Area of significance: Architecture
| Ice House on Little Muddy Creek |
| Ideal Theatre |
| Idlewild |
| Illinois Central Railroad Station and Freight Depot |
| Immaculate Conception Catholic Church and Cemetery |
| Immaculate Conception Church |
| Immanuel Chapel Protestant Episcopal Church |
| Industrial Arts Building |
| Ingram, William, House |
| Innes House |
| Inter-Southern Insurance Building |
| Ironwood |
| Irvin, James F., House |
| Irvinton |
| Isaacs House and Farmstead |
| Jackson Commercial District |
| Jackson, Eli, House |
| Jackson Hall, Kentucky State University |
| Jackson Post Office |
| Jacob, Charles D, Elementary School |
| James-Hansford House |
| Jameson, George W., House |
| James-Owens House |
| January, Ephriam, House |
| January, Thomas, House |
| Jefferson Branch Louisville Free Public Library |
| Jefferson County Armory |
| Jefferson County Courthouse |
| Jefferson County Courthouse Annex |
| Jefferson County Jail |
| Jefferson Street-Fountain Avenue Residential District |
| Jenkins-Berkshire House |
| Jennings, Dr. William, House |
| Jennings-Salter House |
| Joggers, J. C., House |
| Johnson, Ben, House |
| Johnson, Cave, House |
| Johnson, George W., Slave Quarters and Smokehouse |
| Johnson, James, Quarters |
| Johnson, Leonidas, House |
| Johnson-Pence House |
| Johnson's Chapel AME Church |
| Johnston House |
| Johnston-Jacobs House |
| Johnston, J. Stoddard, Elementary School |
| Jones Estate |
| Jones House |
| Jones, Merritt, Tavern |
| Jones, Moses, House |
| Jones-Willis House |
| Jouett, Capt. Jack, House |
| Judge Kirby House |
| Julian Farm |
| Karr House |
| Kaufman-Straus Building |
| Kavanaugh Academy |
| KEAS Tabernacle Christian Methodist Episcopal Church |
| Keisker Building |
| Kellar, Abraham, House |
| Kelley, James, House |
| Kelley, John S., House |
| Kellum House |
| Keltner House |
| Kendrick-Croake House |
| Kendrick-Tucker-Barber House |
| Keneseth Israel Synagogue |
| Kenmil Place |
| Kennedy-Hunsinger Farm |
| Kennedy, Joseph, House |
| Kennedy, Matthew, House |
| Kennedy, Thomas, House |
| Kennedy, Thomas, House |
| Kenton County Library |
| Kentucky Building |
| Kentucky Governor's Mansion |
| Kentucky Hydroelectric Project |
| Kentucky National Bank |
| Kentucky State Arsenal |
| Kentucky State Capitol |
| Kentucky Street School |
| Kentucky Wagon Works |
| Kerrick, W. T., House |
| Kimbrough-Hehr House |
| King, M. J., House |
| Kinkead, Henry P., House |
| Kinkead House |
| Kinlock |
| Kirby, Jesse, Springhouse |
| Kirkpatrick, Joseph, Springhouse |
| Kirksville Christian Church |
| Kirtley House |
| Kirtley, Rev. Robert E., House |
| Kiser Station |
| Kitchen, Van, House |
| Kite, James William, Store |
| Klee Funeral Parlor |
| Knight, Grant, House |
| Knight, J. B., House |
| Knights of Pythias Temple |
| Knight-Taylor-Hockensmith House |
Data from United States Park Service and Wikidata
