Arizona - Criteria: C (architecture/engineering)
| Kendrick Lookout Cabin |
| Kenilworth Elementary School |
| Kent, Jerry, House |
| Kentucky Camp Historic District |
| Kenwill Apartments |
| Kerr, Louise Lincoln, House and Studio |
| Keystone Avenue Bridge |
| Kilcrease, V.W., Building |
| Kingman Army Air Forces Flexible Gunnery School Radio Tower |
| Kingman Commercial Historic District |
| Kingman Grammar School |
| King's Rest Hotel Motor Court |
| Kinishba Ruins |
| Kinjockity Ranch |
| Kitchen, Pete, Ranch |
| Koch, I. B., House |
| Kochsmeier, Henry and Anna, House |
| Koontz, Kinter K. |
| Kratzka, Gus, House |
| Kress, S. H., & Co., Building |
| La Casa del High Jinks |
| La Cuidad de Mexico Grocery |
| La Iglesia Metodista Mexicana, El Divino Redentor |
| Lake Mountain Lookout Complex |
| La Posada Historic District |
| Las Dos Naciones Cigar Factory |
| Lawler-Hetherington Double House |
| Lee Butte Lookout Tower and Cabin |
| Lee Hotel |
| Lee's Ferry and Lonely Dell Ranch |
| Lefever House |
| Lehi School |
| Lehmberg, Dr. H. B., House |
| Lemmon Rock Lookout House |
| Levy, Henry, House |
| Lewis and Pranty Creek Bridge |
| Liberty Methodist Episcopal Church, South |
| Lithodendron Wash Bridge |
| Littlefield, Inez and Davis, Bea, House |
| Little Hell Canyon Bridge |
| Little Lithodendron Wash Bridge |
| Little Mountain Lookout Tree |
| Little Red School |
| Livingston, Dr. David S., House |
| Lorona, Andronico, Second House |
| Lovin and Withers Cottages |
| Lovin & Withers Investment House |
| Lowell Ranger Station |
| Lower Cibecue Lutheran Mission |
| Lyman Lake Rock Art Site |
| Lynx Creek Bridge |
| Magma Hotel |
| Mahoney, W. P., House |
| Main Building, Tempe Normal School |
| Mandell and Meyer Building |
| Manistee Ranch |
| Manjarres House |
| Manning, Levi H., House |
| Marable, George, House |
| Maricopa County Courthouse |
| Marks House |
| Martinez, W. D., General Merchadise Store |
| Martin/Ling House |
| Mary Jane Colter Buildings (Hopi House, The Lookout, Hermit's Rest, and the Desert View Watchtower) |
| Masonic Hall |
| Masonic Temple |
| Masonic Temple |
| Master Mechanic's House |
| Matthews Hall |
| Mayhew, Carmelita, House |
| McCullough-Price House |
| McFadden, Phillip G. House |
| McNair, Jonas, House |
| McPhaul Suspension Bridge |
| Mediterranean Style House |
| Mediterranean Style House |
| Mee, Joe, House |
| Men's Gymnasium, University of Arizona |
| Methodist Episcopal Church |
| Methodist Parsonage |
| Mexican Consulate |
| Miami Avenue Bridge |
| Miami Community Church |
| Midgley, W. W., Bridge |
| Miller, Hugo, House |
| Miller, Pryor, House |
| Milligan House |
| Mineral Creek Bridge |
| Ming, A.B., House |
| Mingus Lookout Complex |
| Mohave County Courthouse and Jail |
| Mohave County Hospital |
| Monroe School |
| Monte Vista Lookout Cabin |
| Montezuma Castle National Monument |
| Moqui Lookout Cabin |
| Moqui Ranger Station |
| Morgan, David-Bronson, Earl A., House |
| Morgan House |
| Morin House |
Data from United States Park Service and Wikidata
