California - Area of significance: Architecture
| Kotani-En Garden |
| Kottinger, John W., Adobe Barn |
| Kraemer, Samuel, Building (American Savings Bank/First National Bank) |
| Kraft, Herbert, Memorial Free Library |
| Kress, George R., House |
| Kreuzer Ranch |
| Krisel Tract Home, 1882 S. Caliente Road (APN 511032005-9) |
| Kroger-Melrose District |
| Krotoszyner, Dr. Martin M., Medical Offices and House |
| Krough House |
| Krug, Charles, Winery |
| Kruger House |
| Kuchler Row |
| La Belle Tour |
| La Casa Alvarado |
| La Casa Primera de Rancho San Jose |
| Lacey, Friend, House |
| Ladies' Relief Society Children's Home |
| Lafayette Hotel |
| Lais, Charles, House |
| La Jolla Post Office |
| La Jolla Women's Club |
| Lake County Courthouse |
| Lake Norconian Club |
| Lake Vernon Snow Survey Shelter |
| La Loma Bridge |
| Landrum, Andrew J., House |
| LANE VICTORY |
| Lantarnam Hall |
| Lanterman House |
| Larkin House |
| Larkmead Winery |
| Larkspur Downtown Historic District |
| Larsen Family House |
| Las Casitas Court |
| Las Flores Adobe |
| Lassen County Court House |
| Lassen Volcanic National Park Highway Historic District |
| Lathrop House |
| Laughlin, James H. and Frances E., House |
| Lautner, John and Mary, House |
| Lava Beds National Monument Archeological District |
| Lawrence Warehouse |
| LeConte Hall |
| LeConte Memorial Lodge |
| Lee, Don, Building |
| Lee, Robert E., Hotel |
| Leggett House |
| Leggett, Thomas H., House |
| Leib Carriage House |
| Leonis Adobe |
| Le Petit Trianon |
| Lettunich Building |
| LEWIS ARK (Houseboat) |
| Lewiston Historic District |
| Libby, Charles, House |
| Libby McNeil and Libby Fruit and Vegetable Cannery |
| Liberty Hall |
| Liberty Street Historic District |
| Lick, James, Mill |
| Lightship WAL-605, RELIEF |
| Lincoln, Abraham, Elementary School |
| Lincoln Heights Branch |
| Lincoln Park Historic District |
| Lincoln Place Apartments |
| Lincoln Public Library |
| Lindstrom House |
| Lisbon Winery |
| Little Tokyo Historic District |
| Live Oak Ranch |
| Livermore Carnegie Library and Park |
| Livermore Veterans Administration Hospital, Building 62 |
| Llano Road Roadhouse |
| Lloyd, Harold, Estate |
| Locke Historic District |
| Locke House |
| Locke's Meat Market |
| Lodi Arch |
| Loewy House |
| Lombardo Ranch |
| Lompoc Public Library |
| Lompoc Veterans Memorial Building |
| Long Beach Professional Building |
| Longfellow-Hastings House |
| Longley, Howard, House |
| Long-Waterman House |
| Lopez Adobe |
| Loring House |
| Los Alamos Ranch House |
| Los Altos Apartments |
| Los Angeles Central Library |
| Los Angeles City Hall |
| Los Angeles Pacific Company Ivy Park Substation |
| Los Angeles Plaza Historic District |
| Los Angeles Union Passenger Terminal |
| Los Banos del Mar |
| Los Cerritos Ranch House |
| Los Coches Rancho |
| Los Feliz Boulevard Courtyard Apartments Historic District |
| Los Feliz Village Multi-Family Residential Historic District |
Data from United States Park Service and Wikidata
