Oklahoma - Criteria: A (event)
| India Temple Shrine Building |
| Ingersoll Tile Elevator |
| Ingle Brothers Broomcorn Warehouse |
| Initial Point |
| International Temple, Supreme Assembly, Order of the Rainbow for Girls |
| I.O.O.F. Building of Buffalo |
| I.O.O.F. Hall |
| Jackson, Barnett, No. 11 Oil Well |
| Jackson Conoco Service Station |
| Jackson County Courthouse |
| Jefferson County Courthouse |
| Jenson Tunnel |
| Johnson House |
| Kaw City Depot |
| Kay County Courthouse |
| KCS Railway Depot |
| Keel Creek Bridge |
| Kenwood Historic District |
| Kingfisher Armory |
| Kingfisher College Site |
| Kingfisher Memorial Hall |
| Kingfisher Post Office |
| Kinta High School |
| Kiowa County Courthouse |
| Kisner, Robert R. and Minnie L., House |
| Knowles Grain Elevator |
| Konawa Armory |
| Koweta Mission Site |
| Lake Murray State Park |
| Lake Overholser Bridge |
| Lake Ponca Duck Pond Historic District |
| Lane Cabin |
| Laverne's North Main Street District |
| Lawton High School |
| Lawton National Guard Armory |
| Lee, Robert E., School |
| LeFlore County Courthouse |
| Levering Mission |
| Little Deep Fork Creek Bridge |
| Logan Apartments |
| Love County Courthouse |
| Love County Jail and Sheriff's Residence |
| Magnolia Service Station |
| Magruder Plots |
| Mahoney-Clark House |
| Major County Courthouse |
| Mangum Armory |
| Mangum Community Building |
| Manhattan Building |
| Maple Ridge Historic Residential District |
| Mardock Mission |
| Marland Filling Station |
| Marshall County Courthouse |
| Marshall Hall |
| Mascho Building and Public Privy |
| Mason, A. J., Building |
| Masonic Temple |
| Mayo Building |
| McAlester Scottish Rite Temple |
| McClain County Courthouse |
| McDougal Filling Station |
| McGranahan Portion of the Chisholm Trail Roadbed |
| McLain Rogers Park |
| Meacham Building |
| Medicine Park Hotel and Annex |
| Meeker Town Hall |
| Mennoville Mennonite Church |
| Merchants National Bank Building |
| Methodist Church of Marshall |
| Miami Marathon Oil Company Service Station |
| Midlothian School |
| Minco Armory |
| Mitchell Hall |
| M.K. and T. Depot in Laverne |
| Modoc Mission Church and Cemetery |
| Moore Public School Building |
| Morrison Baptist Church |
| Mount Zion Baptist Church |
| Mulhall United Methodist Church |
| Mulvey Mercantile |
| Municipal Auditorium |
| Murphy, George A., House |
| Murray County Courthouse |
| Murrell Home |
| Nail's Station |
| Narcissa D-X Gas Station |
| National Guard Statistical Building |
| Nellie Johnstone No. 1 |
| New Cordell Courthouse Square Historic District |
| New Hope Baptist Church |
| Newkirk Water Purification Plant |
| Nichols Park |
| Noble County Courthouse |
| Noble Hotel |
| Norman Public Library |
| Nuyaka Mission |
| Oil Capital Historic District |
| Oklahoma A & M College Agronomy Barn and Seed House |
| Oklahoma City Discovery Well |
| Oklahoma City University |
Data from United States Park Service and Wikidata
