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- Moore, Samuel L.1
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- Nelson, Arthur E. (Arthur Edward), 1922-1
- Nelson, Willis H. (Willis Howard), 1920-1
- Nicaragua. Dirección General de Cartografía.1
- Nichols, William D.1
- Noble, Donald C.1
- Novotny, Robert F., 1926-19661
- Oldale, Robert N.1
- Ontario. Department of Mines1
- Ordnance Survey (Ireland)1
- Oriel, Steven S., cartographer1
- Orkild, Paul P.1
- Palliser, John, 1807-18871
- Palmer, James Edward1
- Peterson, Warren Lee, 1925-1
- Pierce, William Gamewell, 1904-1
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