| Jack Perry's | Grand Island | NE |
| Jensen A O | Omaha | NE |
| J. F. O'Neill Packing | Omaha | NE |
| John Day Rubber & Supply | Omaha | NE |
| John Deere | Omaha | NE |
| Johnson C G Boiler Works | Omaha | NE |
| Kansas-Nebraska Natural Gas | Fremont | NE |
| Kansas-Nebraska Natural Gas | Big Springs | NE |
| Kansas-Nebraska Natural Gas | Hastings | NE |
| Kearney State College | Kearney | NE |
| Kellogg | Omaha | NE |
| Kilwit Plaza | Omaha | NE |
| Kitty Clover Div Fairmont | Omaha | NE |
| Kitty Clover Potato Chip | Omaha | NE |
| Kramer | Bellevue | NE |
| K St Power Plant | Lincoln | NE |
| Land Paving | Omaha | NE |
| Lauhoff Grain | Crete | NE |
| Lauritzen Grain & Lumber | Fort Calhoun | NE |
| L.D. Wright Steam Plant | Fremont | NE |
| Legault Residence | Lincoln | NE |
| Lincoln Air Force Base | Lincoln | NE |
| Lincoln Chamber Of Commerce | Lincoln | NE |
| Lincoln East High School | Lincoln | NE |
| Lincoln Fraction | Lincoln | NE |
| Lincoln Gas & Electric Light | Lincoln | NE |
| Lincoln General Hospital | Lincoln | NE |
| Lincoln Regional Center | Lincoln | NE |
| Lincoln Traction | Lincoln | NE |
| Loup River Public Power District | Lincoln | NE |
| Loup River Public Power District | Bellevue | NE |
| Loup River Public Power District | Columbus | NE |
| Lutheran Central Theological Seminary | Fremont | NE |
| Lutheran Hospital | Grand Island | NE |
| Lutheran Hospital | Omaha | NE |
| Madsen Burner Services | Omaha | NE |
| Madsen Hank Burner Service | Omaha | NE |
| Mary Lanning Memorial Hospital | Hastings | NE |
| Master Electronics | Omaha | NE |
| McCook Community Hospital | McCook | NE |
| Merle Beattie Grade School | Lincoln | NE |
| M.E. Smith Warehouse | Omaha | NE |
| Methodist Church | Beatrice | NE |
| Methodist Hospital | Omaha | NE |
| Midlands Hospital | Papillion | NE |
| Midwest Asbestos | Omaha | NE |
| Milder Oil | Omaha | NE |
| Missouri Pacific Railroad | Omaha | NE |
| Mitchell Elementary School | Mitchell | NE |
| Mitchell Junior/Senior High School | Mitchell | NE |
