Wisconsin - Significance region: Local
| Kittleson House |
| Klein Dairy Farmhouse |
| Kline's Department Store |
| Klingholz, Charles and Herriette, House |
| Klueter and Company Wholesale Grocery Warehouse |
| Knapp-Astor House |
| Knapp-Calkins Farmstead |
| Kneeland-Walker House |
| Knickerbocker Hotel |
| Koch, Carl, Block |
| Koeffler-Baumgarten Double House |
| Koehler, Frank, House and Office |
| Koelsch Funeral Home |
| Koepsel House |
| Kohl, Edward F. and Jean, House |
| Kohlmann, Friederich, House |
| Kohl's Food Store |
| Kopperud Park Residential Historic District |
| Krause, Daniel E., Stone Barn |
| Kriesel, Louis C. and Augusta, Farmstead |
| Kronser, Joseph, Hotel and Saloon |
| Kuehn Blacksmith Shop-Hardware Store |
| Kuhl, Christina, House |
| Kurth, John H., and Company Office Building |
| Lachmund Family House |
| La Crosse Armory |
| LaCrosse Commercial Historic District |
| La Crosse Plow Company Building |
| LaCrosse State Teachers College Training School Building |
| Laflin Avenue Historic District |
| Lain-Estburg House |
| Lake Mills Downtown Commercial Historic District |
| Lake Nebagamon Auditorium |
| Lake Park |
| Lake Street Historic District |
| Lake Tomahawk Site |
| Lakeview Hospital |
| Lake View Sanatorium |
| Lamar Community Center |
| Lamb Building |
| Lancaster Municipal Building |
| Lancaster Post Office |
| Laney School |
| Langdon Street Historic District |
| Langlade County Courthouse |
| Lappin-Hayes Block |
| LaPrairie Grange Hall No. 79 |
| Larsen Cave |
| Larson, August Cornelius, House |
| Larson, L. A., & Co. Store |
| Lathrop-Munn Cobblestone House |
| Laue, Frederick, House |
| Laue, Frederick, Jr., House |
| Lauerman Brothers Department Store |
| Laverty-Martindale House |
| Lawson Airplane Company-Continental Faience and Tile Company |
| Lawton, C. A., Company |
| Leitch, William T., House |
| Lena Road School |
| Lenfestey, Agnes and Ruth Lenfestey Mark, House |
| Leonard-Leota Park |
| Leonard, William Ellery, House |
| Lewis, Frank T. and Polly, House |
| Lewis, Gov. James T., House |
| Lewis-Williams House |
| Library Park |
| Library Park |
| Library Park Historic District |
| Lidice Memorial |
| Lie, Aslak, Cabin |
| Lincoln Boulevard Historic District |
| Lincoln Creek Parkway |
| Lincoln School |
| Lincoln School |
| Lincoln School |
| Lincoln Street Historic District |
| Lindauer and Rupert Block |
| Linden High School |
| Linden Methodist Church |
| Linden Street Historic District |
| Lindsay-Bostrom Building |
| Lindsley, Perry, House |
| Lindstrom, John, Round Barn |
| Little Lake Archeological District |
| Little Norway |
| Little St. Germain Creek Site |
| Lockwood Barn |
| Lodi Downtown Historic District |
| Lodi School Hillside Improvement Site |
| Lodi Street-Prairie Street Historic District |
| Loeffler, Otto and Ida, House |
| Loewe-Weis-Wilson Farm |
| Lohman Funeral Home and Livery Stable |
| Longfellow School |
| Longfellow School |
| Look West Historic District |
| Loomis, Horace, House |
| Lord, Charles, House |
| Losey Memorial Arch |
| Lougee, George A., House |
Data from United States Park Service and Wikidata
