- National Railway Publication Company2
- Neill, N. P.(Nelson Prentice), cartographer.2
- New York (State). State Engineer and Surveyor2
- Newberry, J. S. (John Strong), 1822-18922
- Nichols, J. A.2
- Nicollet, J. N. (Joseph Nicolas), 1786-18432
- North-Western Provinces (India). Superintendent, Grand Trunk Road2
- North-Western Provinces (India). Superintendent, Grand Trunk Road.2
- Nowack, W.K.2
- O'Donoghue, John, 1946-2
- Ocean County Board of Chosen Freeholders2
- Olmsted, Frederick Law, 1822-19032
- On Seiken.2
- Orahood, C. H. (Charley Harold),1882-cartographer.2
- Oregon Railway and Navigation Company2
- Oregon State Highway Commission2
- Owen, David Dale, 1807-18602
- Paine, Paul M2
- Patton, John B. (John Barratt), 1915-2
- Pennsylvania State Chamber of Commerce. State Publicity Bureau2